CN104363584B - A kind of method, apparatus and terminal of short message Encrypt and Decrypt - Google Patents

Abstract

The embodiment of the invention discloses a method, device and terminal for encrypting and decrypting short messages, relates to the technical field of mobile terminals, and can reduce the time spent in the process of encrypting and decrypting short messages. Wherein, the short message encryption method includes: obtaining the first number and the second number; using the first number and the second number to generate a target password; using the target password to encrypt the short message to be sent. The short message decryption method includes: obtaining the first number and the second number; using the first number and the second number to generate a target password; using the target password to decrypt the received short message and obtain the decrypted short message. The present invention is applicable to the scene where the sender terminal encrypts the short message and the receiver terminal decrypts the short message.

Description

Method, device and terminal for encrypting and decrypting short messages

technical field

The invention relates to the technical field of mobile terminals, in particular to a short message encryption and decryption method, device and terminal.

Background technique

With the development of electronic information technology, more and more terminals use short messages to transmit information between terminals. However, during the transmission of short messages, short messages may be intercepted by hackers, resulting in information leakage in short messages. create safety hazards.

In order to prevent information leakage in the short message, in the prior art, the sender terminal encrypts the short message with a public key, and sends the encrypted short message to the receiver terminal, and the receiver terminal uses the private key corresponding to the public key to , decrypt the encrypted short message to obtain the short message.

Since there is a corresponding relationship between the public key of the sender terminal and the private key of the receiver, when the sender terminal uses the public key to encrypt the short message, it needs to negotiate with the receiver terminal so that the receiver terminal knows the encryption method used by the sender terminal. public key, so that the recipient uses the private key corresponding to the public key to decrypt the encrypted short message, ensuring that the short message can be normally transmitted between the sender terminal and the receiver terminal. Every time when the sender terminal and the receiver terminal transmit a short message, the sender terminal needs to negotiate with the receiver terminal on the public key used for encryption and the private key corresponding to the public key used for decryption. In the process of encrypting and decrypting the short message, the negotiation between the sending terminal and the receiving terminal will take a lot of time, which increases the time spent in the process of encrypting and decrypting the short message.

Contents of the invention

Embodiments of the present invention provide a method, device and terminal for encrypting and decrypting short messages, which can reduce the time spent in the process of encrypting and decrypting short messages.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In the first aspect, the embodiment of the present invention provides a method for encrypting a short message, including:

Obtaining a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal;

using the first number and the second number to generate a target password;

The short message to be sent is encrypted by using the target password.

In a second aspect, the embodiment of the present invention provides a method for decrypting a short message, including:

Obtaining a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal;

using the first number and the second number to generate a target password;

The received short message is decrypted by using the target password, and the decrypted short message is obtained.

In a third aspect, the embodiment of the present invention provides a device for encrypting short messages, including:

A first obtaining module, configured to obtain a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal;

A first generating module, configured to generate a target password by using the first number and the second number;

The encryption module is used to encrypt the short message to be sent by using the target password.

In a fourth aspect, an embodiment of the present invention provides a device for decrypting a short message, including:

The second obtaining module is used to obtain a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal;

A second generating module, configured to generate a target password by using the first number and the second number;

The decryption module is used to decrypt the received short message by using the target password, and obtain the decrypted short message.

In a fifth aspect, an embodiment of the present invention provides a terminal, and the terminal includes the device for encrypting short messages provided by the above solution.

In a sixth aspect, an embodiment of the present invention provides a terminal, and the terminal includes the device for decrypting a short message provided by the above solution.

A short message encryption and decryption method, device, and terminal provided by the embodiments of the present invention, the sender terminal can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to decrypt the short message Encryption, the receiving terminal uses the same method as the sending terminal to generate a target password, and uses the target password to decrypt the short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate a short The target password for message encryption, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus eliminating the need to send The time spent on negotiating between the receiving terminal and the receiving terminal is shortened, and the time spent on encrypting and decrypting the short message is reduced.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

Fig. 1 is the flowchart of a kind of short message encryption method that the embodiment of the present invention provides;

Fig. 2 is the flow chart of a kind of specific implementation of the method for a kind of short message encryption that the embodiment of the present invention provides;

Fig. 2a and Fig. 2b are schematic illustrations illustrating the combination of numbers in the selected first number and the second number provided by the embodiment of the present invention;

Fig. 2c is a schematic illustration of the Virginia cipher table provided by the embodiment of the present invention;

Fig. 3 is a flow chart of another specific implementation of a method for encrypting a short message provided by an embodiment of the present invention;

Fig. 4 is a flow chart of a method for decrypting a short message provided by an embodiment of the present invention;

Fig. 5 is a flow chart of a specific implementation of a method for decrypting a short message provided by an embodiment of the present invention;

FIG. 6 is a flow chart of another specific implementation of a method for decrypting a short message provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a short message encryption device provided by an embodiment of the present invention;

Fig. 8 is a schematic structural diagram of an apparatus for decrypting a short message provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The technical solution provided by the embodiment of the present invention is applied to the scene where the sender terminal and the receiver terminal encrypt and decrypt the short message. The sender terminal and the receiver terminal can be mobile phones or computers installed with software for sending and receiving short messages or tablet etc. The sender terminal encrypts the short message to be sent, and sends the encrypted short message to the receiver terminal, and the receiver terminal receives the encrypted short message, and decrypts the encrypted short message to obtain the short message.

The embodiment of the present invention provides a short message encryption method, which is applied to the sender terminal, as shown in Figure 1, including:

101. Obtain a first number and a second number.

Wherein, the first number is the phone number of the sending terminal, and the second number is the phone number of the receiving terminal. The sending terminal acquires its own phone number and the phone number of the receiving terminal corresponding to the short message, and the number of digits of the phone number is not limited here.

Wherein, after finishing editing the short message, the sending terminal may receive a user's selection instruction to decide whether to encrypt the short message to be sent.

102. Generate a target password by using the first number and the second number.

Among them, the sender terminal uses the phone numbers of the sender terminal and the receiver terminal to generate a password for the phone number to be sent by selecting and combining numbers in the phone number, replacing characters with mapping relationships, and using various password tables and other technical means. The target password for encrypting short messages.

It should be noted that the target password obtained when the sending terminal encrypts the short message is the same as the target password used when the receiving terminal decrypts the short message, that is, the sending terminal generates the target password in the same way as the receiving terminal generates the target password. same.

103. Encrypt the short message to be sent by using the target password.

Wherein, utilize the target password generated in 102 to encrypt the short message to be sent.

The method for encrypting a short message provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to encrypt the short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate a short The target password for message encryption, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus eliminating the need to send The time spent on negotiating between the receiving terminal and the receiving terminal is shortened, and the time spent on encrypting and decrypting the short message is reduced.

Further, in order to further ensure the security of the encrypted short message, the embodiment of the present invention also provides a specific scheme of a method for encrypting a short message, wherein the target password includes M characters; The execution process is further refined, and 102 can be specifically implemented as 1021-1024, as shown in Figure 2, including:

1021. Select M1 numbers in the first number and M2 numbers in the second number.

Wherein, the target password includes M characters, and M is an integer. Select M1 numbers from the first number, and select M2 numbers from the second number, so that M1+M2=M, and both M1 and M2 are integers. In the process of selecting the numbers in the first number and the second number by the sending terminal, specifically, avoid selecting numbers with strong regularity in the first number and the second number, for example, most of the first digits of mobile phone numbers are the same, are all 1, you can avoid selecting such numbers. When both the first number and the second number are 11-digit mobile phone numbers, the target password is required to be 128 bits, that is, the target password is 16 bytes long, and it can also be said that the target password includes 16 characters, because most of the mobile phone numbers The first digit is 1, and the second digit is 3, 5 or 8, so when selecting numbers from the first and second numbers, first exclude the first and second digits of the first and second numbers You can choose 8 numbers from the remaining 9 numbers of the first number and 8 numbers from the remaining 9 numbers of the second number. For example: the first number is 13316881857, the second number is 18612345678, the first number 1 and the second number 3 in the first number are discarded, and the sixth digit 8 can also be discarded; at the same time, the second number is discarded In the first number 1 and the second number 3, the sixth number 3 can also be discarded, and the remaining 8 numbers 3, 1, 6, 8, 1, 8, 5, 7 and the first number can be selected. The remaining 8 numbers of the second number are 6, 1, 2, 4, 5, 6, 7, 8.

It should be noted that the M1 digits of the first number and the M2 digits of the second number selected by the receiving terminal are the same as the M1 digits of the first number and the M2 digits of the second number selected by the sending terminal .

1022. Combine the selected M1 digits in the first number with the M2 digits in the second number to obtain a first-level password.

Among them, the sender terminal can directly arrange the M1 numbers in the first number and the M2 numbers in the second number in order to form a first-level password, for example: as shown in Figure 2a, the selected password in the first number The 8 numbers 3, 1, 6, 8, 1, 8, 5, 7 and the 8 numbers selected from the second number 6, 1, 2, 4, 5, 6, 7, 8 are arranged in the original order, Form the first layer of password 3168185761245678. The sender's terminal can also shuffle the M1 numbers in the first number and the M2 numbers in the second number to form a first-level password. For example, as shown in Figure 2b, the 8 numbers selected in the first number 3, 1, 6, 8, 1, 8, 5, 7 and the 8 numbers selected from the second number 6, 1, 2, 4, 5, 6, 7, 8, the adjacent two numbers The positions are reversed to form the first password 1386817516426587.

It should be noted that the method for the receiver terminal to combine the M1 digits of the first number with the M2 digits of the second number is the same as the method for the sender terminal to combine the M1 digits of the first number with the M2 digits of the second number. The method is the same.

1023. Obtain a second layer password according to the shared mapping relationship between the first layer password and the sender terminal.

Wherein, the second-level password is composed of mapping characters, which may specifically be English characters, Latin characters and other characters, and the shared mapping relationship includes the mapping relationship between the numbers in the first number and the mapping characters, and the relationship between the numbers in the second number and the mapping characters. The mapping relationship of mapped characters. The sending terminal may select 10 English characters from 26 English characters to form a mapping relationship with numbers 0-9, that is, the common mapping relationship may be a mapping relationship between the selected 10 English characters and numbers 0-9. For example, the shared mapping relationship is shown in Table 1. If the first layer password is 3168185761245678, the sender terminal can obtain the second layer password FQMTQTSWMQHLSMWT by using the shared mapping relationship shown in Table 1.

Table I

number 0 1 2 3 4 5 6 7 8 9 English characters C Q h f L S m W T Z

It should be noted that the receiver terminal stores the same common mapping relationship as that of the sender terminal.

1024. Obtain the target password according to the second layer password, the common password table stored in the sender terminal, and the preset common key.

Wherein, the target password is obtained according to the mapped characters in the second layer password, the preset shared key, and the shared password table stored in the sender's terminal. The common password table includes the corresponding relationship between the combination of the mapping characters and the characters in the common key and the characters in the target password. The common password table can be a Virginia password table or a multi-table password table similar to the Virginia password table . Using the second-level password and the preset shared key, the password character corresponding to the combination of the mapped character and the character in the shared key can be found in the shared password table, so as to obtain the target password. For example, the common cipher table is the Virginia cipher table shown in Figure 2c. The first row is the mapping character, the first column is the character in the common key, and the other parts in the Virginia cipher table are the characters in the target password. The characters that may appear, according to the characters obtained by crossing the mapped characters and the characters in the common key in the Virginia cipher table, the target password can be obtained. For example: the second-level password is FQMTQTSWMQHLSMWT, the preset common key is RELATIONS, the character in the target password corresponding to the combination of the mapping character F and the character R in the common key is W, and the mapping character Q and the character R in the common key The character in the target password corresponding to the combination of character E is U, and so on, the corresponding relationship between the second-level password, common key and target password that can be obtained is shown in Table 2:

Table II

second password f Q m T Q T S W m Q h L S m W T shared key R E. L A T I o N S R E. L A T I o target password W u x T J B G J E. h L W S f E. h

Therefore, the resulting target password is WUXTJBGJEHLWSFEH.

It should be noted that the receiver terminal stores the same common password table as the sender terminal, and the same preset common key as the sender terminal.

The method for encrypting a short message provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to encrypt the short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate a short The target password for message encryption, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus eliminating the need to send The time spent on negotiating between the receiving terminal and the receiving terminal is shortened, and the time spent on encrypting and decrypting the short message is reduced. Specifically, generate the first-level password according to the first number and the second number, then convert the first-level password into the second-level password, and finally use the password table to convert the second-level password into the target password. Using the password table can effectively Fight against word frequency statistics, increase the difficulty of cracking passwords, and further improve the security of passwords.

In addition, in order to indicate that the short message is an encrypted short message, the embodiment of the present invention also provides a specific scheme of a method for encrypting a short message. This scheme adds 105-106 after 103 in the scheme shown in FIG. 1 , As shown in Figure 3, including:

105. Digest the encrypted short message to be sent to obtain the digest content.

Wherein, the sender terminal can carry out MD5 (Message-Digest Algorithm5, message digest algorithm fifth edition) hash summary to the encrypted short message to obtain the summary content; or, the sender terminal can also perform HMAC ( Hash-based Message Authentication Code, hash operation message authentication code) summary, get the summary content. The sender's terminal and the receiver's terminal use the summary content as an identification that the short message is an encrypted short message.

106. Add the summary content to the encrypted short message to be sent.

Wherein, the sender terminal adds the digest content to the encrypted short message to be sent. Specifically, the digest content can be filled into the tail of the encrypted short message to be sent. In the subsequent sending process, the encrypted message with the digest content added The short message to be sent is sent to the receiver terminal.

The method for encrypting a short message provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to encrypt the short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate a short The target password for message encryption, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus eliminating the need to send The time spent on negotiating between the receiving terminal and the receiving terminal is shortened, and the time spent on encrypting and decrypting the short message is reduced. Moreover, the digest content is added to the encrypted short message to be sent to identify the short message as an encrypted short message, and the receiver terminal can judge whether the received short message needs to be decrypted according to whether the received short message has digest content.

The embodiment of the present invention provides a method for decrypting a short message, which is applied to a receiving terminal, as shown in FIG. 4 , including:

201. Obtain a first number and a second number.

Wherein, the first number is the phone number of the sending terminal, and the second number is the phone number of the receiving terminal. The receiver terminal acquires its own phone number and the phone number of the sender terminal corresponding to the short message, and the number of digits of the phone number is not limited here.

202. Generate a target password by using the first number and the second number.

Wherein, the receiver terminal uses the phone numbers of the sender terminal and the receiver terminal to generate a password for the receiver by selecting and combining numbers in the phone numbers, replacing characters with mapping relationships, and using various password tables and other technical means. The target password for decrypting the short message.

203. Decrypt the received short message by using the target password, and obtain the decrypted short message.

Wherein, the receiver terminal decrypts the received short message by using the target password generated in 202, and obtains the decrypted short message.

A short message decryption method provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to decrypt the encrypted short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate an The target password for decrypting the encrypted short message, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus The time spent in negotiating between the sender terminal and the receiver terminal is saved, and the time spent in the process of encrypting and decrypting the short message is reduced.

Further, in order to further ensure the security of decrypting the encrypted short message, the embodiment of the present invention also provides a specific scheme of a method for decrypting a short message, wherein the target password includes M characters; this scheme is to the scheme shown in Figure 4 The execution process of 202 in 202 is further refined, and 202 can be specifically implemented as 2021-2024, as shown in Figure 5, including:

2021. Select M1 digits in the first number and M2 digits in the second number.

Wherein, M1+M2=M, and said M1, M2, and M are all integers. For the specific content of selecting numbers from the first number and the second number by the receiving terminal, refer to the specific content in step 1021, which will not be repeated here.

It should be noted that the M1 digits of the first number and the M2 digits of the second number selected by the receiving terminal are the same as the M1 digits of the first number and the M2 digits of the second number selected by the sending terminal .

2022. Combine the selected M1 digits in the first number with the M2 digits in the second number to obtain a first-level password.

Wherein, for the method for the receiver terminal to obtain the first-level password, refer to the specific content in step 1022, which will not be repeated here.

It should be noted that the method for the receiver terminal to combine the M1 digits of the first number with the M2 digits of the second number is the same as the method for the sender terminal to combine the M1 digits of the first number with the M2 digits of the second number. The method is the same.

2023. Obtain a second layer password according to the shared mapping relationship between the first layer password and the receiver terminal.

Wherein, the second-level password is composed of mapped characters, and the common mapping relationship includes a mapping relationship between numbers in the first number and mapped characters, and a mapping relationship between numbers in the second number and mapped characters. For the method for the recipient terminal to obtain the second layer password, refer to the specific content in step 1023, which will not be repeated here.

It should be noted that the common mapping relationship stored by the receiving terminal is the same as the common mapping relationship stored by the sending terminal.

2024. Obtain the target password according to the second layer password, the shared password table stored in the receiver terminal, and the preset shared key.

Wherein, the common password table includes the correspondence between the combination of the mapped characters and the characters in the common key and the characters in the target password. For the method for the receiving terminal to obtain the target, refer to the specific content in 1024, which will not be repeated here.

It should be noted that the common password table stored by the receiver terminal is the same as that stored by the sender terminal, and the shared key preset by the receiver terminal is the same as that preset by the sender terminal.

A short message decryption method provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to decrypt the encrypted short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate an The target password for decrypting the encrypted short message, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus The time spent in negotiating between the sender terminal and the receiver terminal is saved, and the time spent in the process of encrypting and decrypting the short message is reduced. Specifically, generate the first-level password according to the first number and the second number, then convert the first-level password into the second-level password, and finally use the password table to convert the second-level password into the target password. Using the password table can effectively Counter word frequency statistics, increase the difficulty of cracking the password, and further improve the security of the password, so that in the decryption process, the receiving terminal can accurately decrypt the encrypted short message of the sending terminal.

In addition, in order to determine whether the received short message is an encrypted short message, the embodiment of the present invention also provides a specific scheme of a short message decryption method. This scheme adds a judgment before decrypting the received short message. Whether this short message is the step of the encrypted short message, as shown in Figure 6, comprises:

301. Detect whether the received short message contains summary content.

Wherein, the summary content indicates that the received short message is an encrypted short message. The summary content can be added to the tail of the received short message. Specifically, the receiver terminal can detect whether the received short message has summary content at the tail.

302. If the received short message includes summary content, acquire a first number and a second number.

Wherein, if the received short message contains digest content, it means that the received short message is an encrypted short message, which needs to be decrypted to obtain a readable short message.

If the received short message does not contain the summary content, it means that the received short message is an unencrypted short message and does not need to be decrypted. The received short message can be opened and read in the same way as an ordinary short message.

303. Generate a target password by using the first number and the second number.

304. Decrypt the received short message by using the target password, and obtain the decrypted short message.

Wherein, for the specific content of 302-304, refer to the content in 201-203, which will not be repeated here.

A short message decryption method provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to decrypt the encrypted short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate an The target password for decrypting the encrypted short message, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus The time spent in negotiating between the sender terminal and the receiver terminal is saved, and the time spent in the process of encrypting and decrypting the short message is reduced. Moreover, the receiver terminal can judge whether the received short message needs to be decrypted according to whether the received short message has digest content, so that if the received short message is not encrypted, the short message is not decrypted to avoid wasteful decryption. resources used.

The embodiment of the present invention provides a short message encryption device 400, as shown in Figure 7, including:

The first obtaining module 401 is configured to obtain the first number and the second number.

Wherein, the first number is the phone number of the sending terminal, and the second number is the phone number of the receiving terminal.

The first generation module 402 is configured to use the first number and the second number to generate a target password.

The encryption module 403 is configured to encrypt the short message to be sent by using the target password.

Specifically, the first generation module 402 is also used to select M1 numbers in the first number and M2 numbers in the second number, wherein the target password includes M characters, M1+M2=M, The M1, M2, and M are all integers; the selected M1 numbers in the first number and the M2 numbers in the second number are combined to obtain a first-level password; according to the first-level password and the shared mapping relationship stored in the sender terminal to obtain a second-level password, the second-level password is composed of mapped characters, and the shared mapping relationship includes the numbers in the first number and the mapped characters A mapping relationship, and a mapping relationship between the numbers in the second number and the mapped characters; according to the second layer password, the shared password table stored in the sender terminal, and the preset shared key, obtain For the target password, the common password table includes the correspondence between the combination of the mapped characters and the characters in the common key and the characters in the target password.

In addition, the encryption module 403 is also configured to digest the encrypted short message to be sent to obtain the digest content; add the digest content to the encrypted short message to be sent.

The short message encryption device provided by the embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to encrypt the short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate a short The target password for message encryption, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus eliminating the need to send The time spent on negotiating between the receiving terminal and the receiving terminal is shortened, and the time spent on encrypting and decrypting the short message is reduced. Specifically, generate the first-level password according to the first number and the second number, then convert the first-level password into the second-level password, and finally use the password table to convert the second-level password into the target password. Using the password table can effectively Fight against word frequency statistics, increase the difficulty of cracking passwords, and further improve the security of passwords. Moreover, the digest content is added to the encrypted short message to be sent to identify the short message as an encrypted short message, and the receiver terminal can judge whether the received short message needs to be decrypted according to whether the received short message has digest content.

The embodiment of the present invention provides a device 500 for decrypting short messages, as shown in FIG. 8 , including:

The second obtaining module 501 is configured to obtain the first number and the second number.

Wherein, the first number is the phone number of the sending terminal, and the second number is the phone number of the receiving terminal.

The second generation module 502 is configured to use the first number and the second number to generate a target password.

The decryption module 503 is configured to use the target password to decrypt the received short message, and obtain the decrypted short message.

Specifically, the second generation module 502 is also used to select M1 numbers in the first number and M2 numbers in the second number, wherein, M1+M2=M, and the M1, M2, M are all integers; combine the M1 digits in the selected first number with the M2 digits in the second number to obtain a first-level password; according to the first-level password and stored in the receiver The common mapping relationship of the terminal is used to obtain the second-level password, the second-level password is composed of mapped characters, the common mapping relationship includes the mapping relationship between the numbers in the first number and the mapped characters, and the second The mapping relationship between the numbers in the second number and the mapped characters; according to the second layer password, the common password table stored in the receiver terminal, and the preset common key, the target password is obtained, and the The common password table includes correspondences between combinations of the mapped characters and characters in the common key and characters in the target password.

In addition, the decryption module 503 is also used to detect whether the received short message contains a summary content, and the summary content indicates that the received short message is an encrypted short message; when the received short message contains a summary content, the receiving The received short message is decrypted.

An apparatus for decrypting a short message provided by an embodiment of the present invention can generate a target password according to the phone number of the sender terminal and the phone number of the receiver terminal, and use the target password to decrypt the encrypted short message. Compared with the prior art in which the sending terminal uses the public key to encrypt and the receiving terminal uses the private key corresponding to the public key to decrypt, the embodiment of the present invention uses the phone number of the sending terminal and the phone number of the receiving terminal to generate an The target password for decrypting the encrypted short message, because the phone number of the sender's terminal and the phone number of the receiver's terminal are the local information of the sender's terminal and the receiver's terminal, there is no need for the sender's terminal and the receiver's terminal to discuss and decide, thus The time spent in negotiating between the sender terminal and the receiver terminal is saved, and the time spent in the process of encrypting and decrypting the short message is reduced. Specifically, generate the first-level password according to the first number and the second number, then convert the first-level password into the second-level password, and finally use the password table to convert the second-level password into the target password. Using the password table can effectively Counter word frequency statistics, increase the difficulty of cracking the password, and further improve the security of the password, so that in the decryption process, the receiving terminal can accurately decrypt the encrypted short message of the sending terminal. Moreover, the receiver terminal can judge whether the received short message needs to be decrypted according to whether the received short message has digest content, so that if the received short message is not encrypted, the short message is not decrypted to avoid wasteful decryption. resources used.

The embodiment of the present invention also provides a terminal, and the terminal includes the device 400 for encrypting short messages provided by the embodiment of the present invention. For details, refer to the above-mentioned embodiments, which will not be repeated here.

The embodiment of the present invention also provides a terminal, and the terminal includes the device 500 for decrypting the short message provided by the embodiment of the present invention. For details, refer to the above-mentioned embodiments, which will not be repeated here.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for relevant parts, please refer to part of the description of the method embodiment.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. A method for short message encryption, characterized in that, comprising: Obtaining a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal; using the first number and the second number to generate a target password; Utilize the target password to encrypt the short message to be sent; Wherein, the target password includes M characters; the use of the first number and the second number to generate the target password includes: Select M1 numbers in the first number and M2 numbers in the second number, where M1+M2=M, and M1, M2, and M are all integers; Combining the selected M1 digits in the first number with the M2 digits in the second number to obtain a first-level password; According to the shared mapping relationship between the first-level password and stored in the sender terminal, a second-level password is obtained, the second-level password is composed of mapped characters, and the shared mapping relationship includes the characters in the first number a mapping relationship between numbers and the mapped characters, and a mapping relationship between numbers in the second number and the mapped characters; Obtain the target password according to the second layer password, the shared password table stored in the sender terminal, and the preset shared key, the shared password table includes the mapped characters and the shared key The correspondence between the combinations of characters in and the characters in the target password. 2. The method according to claim 1, characterized in that, after said utilizing said target password to encrypt the short message to be sent, further comprising: Digesting the encrypted short message to be sent to obtain the digest content; Add the summary content to the encrypted short message to be sent. 3. A method for decrypting a short message, comprising: Obtaining a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal; using the first number and the second number to generate a target password; Utilize the target password to decrypt the received short message, and obtain the decrypted short message; Wherein, the target password includes M characters; the use of the first number and the second number to generate the target password includes: Select M1 numbers in the first number and M2 numbers in the second number, where M1+M2=M, and M1, M2, and M are all integers; Combining the selected M1 digits in the first number with the M2 digits in the second number to obtain a first-level password; According to the common mapping relationship between the first-level password and the receiver terminal, a second-level password is obtained, the second-level password is composed of mapped characters, and the common mapping relationship includes the characters in the first number a mapping relationship between numbers and the mapped characters, and a mapping relationship between numbers in the second number and the mapped characters; Obtain the target password according to the second-level password, a shared password table stored in the receiver terminal, and a preset shared key, the shared password table including the mapped characters and the shared key The correspondence between the combinations of characters in and the characters in the target password. 4. The method according to claim 3, further comprising: before said acquiring the first number and the second number: Detecting whether the received short message contains summary content, the summary content indicates that the received short message is an encrypted short message; If the received short message contains digest content, the decryption process is performed on the received short message. 5. A device for encrypting short messages, characterized in that it comprises: A first obtaining module, configured to obtain a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal; A first generating module, configured to generate a target password by using the first number and the second number; An encryption module, configured to encrypt the short message to be sent by using the target password, The first generation module is also used to select M1 numbers in the first number and M2 numbers in the second number, wherein the target password includes M characters, M1+M2=M, The M1, M2, and M are all integers; the selected M1 numbers in the first number and the M2 numbers in the second number are combined to obtain a first-level password; according to the first-level password and the shared mapping relationship stored in the sender terminal to obtain a second-level password, the second-level password is composed of mapped characters, and the shared mapping relationship includes the numbers in the first number and the mapped characters A mapping relationship, and a mapping relationship between the numbers in the second number and the mapped characters; according to the second layer password, the shared password table stored in the sender terminal, and the preset shared key, obtain For the target password, the common password table includes the correspondence between the combination of the mapped characters and the characters in the common key and the characters in the target password. 6. A device for decrypting short messages, characterized in that it comprises: The second obtaining module is used to obtain a first number and a second number, the first number is the phone number of the sender terminal, and the second number is the phone number of the receiver terminal; A second generating module, configured to generate a target password by using the first number and the second number; The decryption module is used to decrypt the received short message by using the target password, and obtain the decrypted short message, The second generating module is also used to select M1 numbers in the first number and M2 numbers in the second number, wherein the target password includes M characters, M1+M2=M, The M1, M2, and M are all integers; the selected M1 numbers in the first number and the M2 numbers in the second number are combined to obtain a first-level password; according to the first-level password and the shared mapping relationship stored in the receiving terminal to obtain a second-level password, the second-level password is composed of mapped characters, and the shared mapping relationship includes the numbers in the first number and the mapped characters A mapping relationship, and a mapping relationship between numbers in the second number and the mapped characters; according to the second layer password, the shared password table stored in the receiver terminal, and the preset shared key, obtain For the target password, the common password table includes the correspondence between the combination of the mapped characters and the characters in the common key and the characters in the target password. 7. A terminal, characterized in that the terminal comprises the device according to claim 5. 8. A terminal, characterized in that the terminal comprises the device according to claim 6.