CN106686407B - A kind of automatic identification encryption and decryption method and system for video data transmission - Google Patents

Abstract

The invention discloses an automatic identification, encryption and decryption method for video data transmission. The steps of the method include: acquiring transmission parameters of a video file to be transmitted, confirming the path of the video file to be transmitted and the current state of the video file to be transmitted S1, according to The user encrypts or decrypts the instruction, encrypts or decrypts the current video file to be transmitted S2, determines whether the encryption or decryption operation is successful, and returns the final operation status to the user to complete the automatic identification and encryption operation S3. The technical solution of the present invention occupies a small data space, only about 30KB, and can be invoked by a server or other related video playback software; by adopting the local file encryption method, encryption or decryption can be quickly realized, and the encryption or decryption state can be set for the video file. , and can judge the status of the video file.

Description

A kind of automatic identification encryption and decryption method and system for video data transmission

technical field

The invention relates to the technical field of information encryption, in particular to an automatic identification encryption and decryption method and system for video data transmission.

Background technique

With the rapid development of science and technology, the dissemination of electronic data has been widely integrated into people's daily life, for example, electronic data such as video, audio and other data.

People can use communication devices to store electronic data. Some personal privacy-related data (for example, some photos, videos, and mobile banking data) do not wish to be easily accessed by others, and the data that do not wish to be accessed by others can be encrypted. In the related art, the encryption method is usually password encryption, and the encrypted password can be characters, numbers, patterns, etc.; when accessing encrypted data, a correct password needs to be input.

Today, commonly used video encryption and decryption tools are usually software tools for manual operation by users. The main types are as follows:

1) The user needs to manually open the software and select the video file that needs to be encrypted or decrypted, and then select the corresponding encryption or decryption operation;

2) The user needs to manually determine whether the video has been encrypted. For example, if you try to play the video file, if it cannot be played normally, the video file may be encrypted.

Encryption or decryption operations of conventional encryption and decryption software tools need to be performed manually, which is inconvenient for users to use, and the encryption and decryption processes are slow. Encrypting all parts of a file is highly secure, but it takes up a lot of memory space and is not conducive to file storage and transmission. And the specified location cannot be encrypted or decrypted, and the usage is inflexible.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions

An automatic identification encryption and decryption method for video data transmission, the steps of the method include:

S1, obtain the transmission parameters of the video file to be transmitted, and confirm the path of the video file to be transmitted and the current state of the video file to be transmitted;

S2. Encrypt or decrypt the current video file to be transmitted according to the user's encryption or decryption instruction;

S3. Determine whether the encryption or decryption processing operation is successful, and return the final operation status to the user to complete the automatic identification and encryption operation.

Preferably, the current state of the video file to be transmitted includes three states: encrypted, decrypted and unprocessed.

Preferably, the step S2 includes:

S21, initialize the maximum number of attempted encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result;

S22, through the judgment condition: whether the encryption or decryption state is an operation failure state and the current count of encryption or decryption times is less than the maximum number of attempted encryption or decryption operations maxCount, determine whether to try to encrypt the video file to be transmitted; if the judgment condition is met, execute Step S23, if the judgment condition is not met, step S3 is executed;

S23, set the operation identifier of the encryption or decryption operation for the video file, and determine whether the operation identifier is set successfully, if successful, then perform step S24, if it fails, then try to encrypt or decrypt the operation count plus 1, and repeat steps S22 and S23 , until the identification succeeds or the judgment condition of step S22 is not satisfied;

S24. According to user requirements, encrypt or decrypt the content of the specified location of the video file to be transmitted;

S25, determine whether the encryption or decryption operation is successful, if successful, then complete the encryption or decryption operation of the video file to be transmitted, if it fails, then execute steps S22 to S25, until the operation is successful or does not meet the judgment condition of step S22.

Preferably, the S24 includes:

S241, take the head 1024 bytes of the video file to be transmitted as the object of encryption or decryption;

S242, set the initial position as site=0;

S243: Determine whether the encryption of the header 1024 bytes of the current video file to be transmitted is completed, if not, extract 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take out 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data;

S244. Write the encrypted or decrypted data to the site, and exit if the writing fails;

S245, take 16 bytes from the 1024 bytes, that is, site=site+16, and repeat steps S243 to S245 until the encryption or decryption of the 1024-byte data is completed.

Preferably, in the step S243, if the data read fails or the encryption/decryption operation fails, exit directly.

Preferably, the step S3 includes:

S31. If the encryption or decryption operation is successful, the operation success status is returned;

S32. If the encryption or decryption operation fails, try to roll back to the state before the encryption or decryption operation of the video file;

S33. If the rollback operation is successful, the operation failure status is returned, and if the rollback operation fails, the unrecoverable status is returned.

An automatic identification encryption and decryption system for video data transmission, the system includes:

The file identification unit obtains the video file transmission request, and confirms the path of the video file to be transmitted and the current state of the video file to be transmitted;

The encryption unit, according to the user's encryption or decryption instruction, encrypts or decrypts the current video file to be transmitted;

The status feedback unit determines whether the encryption or decryption processing operation is successful, and returns the final operation status to the user to complete the automatic identification and encryption operation.

Preferably, the current state of the video file to be transmitted includes three states: encrypted, decrypted and unprocessed.

Preferably, the encryption unit includes:

The initialization module initializes the maximum number of attempted encryption or decryption operations maxCount, the current count of encryption or decryption operations, and the initial state of the video encryption or decryption result;

The first judgment module determines whether to try to encrypt the video file to be transmitted through judgment conditions: whether the encryption or decryption state is an operation failure state and the current encryption or decryption times count is less than the maximum attempted encryption or decryption operation times maxCount; if the judgment conditions are met , then the operation identification of the encryption or decryption operation is set for the video file, if the judgment condition is not satisfied, then the operation state determined by the state feedback unit is returned to the user;

The operation identification setting module is used to set the operation identification of the encryption or decryption operation for the video file, and judge whether the operation identification setting is successful. If successful, the user-specified content encryption or decryption operation is performed. If it fails, the number of attempts to encrypt or decrypt the operation count is counted. Add 1, and repeat the operation of the first judgment module and the operation identification setting module in the steps until the identification is successful or does not meet the judgment condition of the first judgment module;

Specify the content processing module to encrypt or decrypt the content in the specified location of the video file to be transmitted according to user needs;

The second judgment module judges whether the encryption or decryption operation is successful. If successful, the encryption or decryption operation of the video file to be transmitted is completed. If it fails, the first judgment module, the operation identification setting module, the specified content processing module and the first judgment module are executed The second judging module operates until the operation succeeds or the judging conditions of the first judging module are not satisfied.

Preferably, the state feedback unit includes:

The encryption result judgment module, if the encryption or decryption operation is successful, returns the operation success status, if the encryption or decryption operation fails, it tries to roll back to the state before the encryption or decryption operation of the video file;

The rollback result judgment module, if the rollback operation is successful, it will return the operation failure status, and if the rollback operation fails, it will return the unrecoverable status.

The beneficial effects of the present invention are as follows:

The technical solution of the present invention operates in a calling mode, rather than an interface-based manual operation, which is convenient for system or program calling and execution. The encryption or decryption status flag is added to facilitate the system or program to determine the file encryption or decryption status. Using this scheme to generate library files greatly reduces the storage space of the tool plug-in and greatly improves the speed of encryption and decryption.

Description of drawings

The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings;

Fig. 1 shows the schematic diagram of the automatic identification encryption and decryption method described in this scheme;

FIG. 2 shows a schematic diagram of the local loop encryption or decryption method described in this scheme.

Detailed ways

In order to illustrate the present invention more clearly, the present invention will be further described below with reference to the preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

As shown in Figure 1, the present invention discloses an automatic identification encryption and decryption method for video data transmission. The steps of the method include:

Step S1, obtain the transmission parameters of the video file to be transmitted, and confirm the path of the video file to be transmitted and the current state of the video file to be transmitted; wherein, the current state of the video file to be transmitted includes: encrypted, decrypted and unprocessed three kinds state. Among them, two parameters need to be called in this step, the first parameter is the path of the video file to be encrypted, and the second parameter is the operation parameter, which is represented by the following code:

The number 0 represents decryption, pass this parameter, and the method will decrypt the video;

The number 1 represents encryption, pass this parameter, and the method will encrypt the video;

The number 2 represents the status of the video file, and this parameter is passed. The method only checks the current state of the file and returns three states, that is, the number 0 means that the file has not been processed; the number 1 means that the file has been encrypted; the number 2 means that the file has been decrypted.

Step S2: Encrypt or decrypt the video file currently to be transmitted according to the user's encryption or decryption instruction. This step S2 includes:

S21, initialize the maximum number of attempted encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result;

S22, through the judgment condition: whether the encryption or decryption state is an operation failure state and the current count of encryption or decryption times is less than the maximum number of attempted encryption or decryption operations maxCount, determine whether to try to encrypt the video file to be transmitted; if the judgment condition is met, execute Step S23, if the judgment condition is not met, step S3 is executed;

S23, set the operation identifier of the encryption or decryption operation for the video file, and determine whether the operation identifier is set successfully, if successful, then perform step S24, if it fails, then try to encrypt or decrypt the operation count plus 1, and repeat steps S22 and S23 , until the identification succeeds or the judgment condition of step S22 is not satisfied;

S24, according to user requirements, perform encryption or decryption operation on the content of the designated location of the video file to be transmitted; wherein, as shown in Figure 2, this step S24 includes:

S241, take the head 1024 bytes of the video file to be transmitted as the object of encryption or decryption;

S242, set the initial position as site=0;

S243: Determine whether the encryption of the header 1024 bytes of the current video file to be transmitted is completed, if not, extract 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take out 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data; if the data reading fails or the encryption/decryption operation fails in this step, exit directly

S244. Write the encrypted or decrypted data to the site, and exit if the writing fails;

S245, take 16 bytes from the 1024 bytes, that is, site=site+16, and repeat steps S243 to S245 until all the 1024-byte data is encrypted or decrypted;

S25, determine whether the encryption or decryption operation is successful, if successful, then complete the encryption or decryption operation of the video file to be transmitted, if it fails, then execute steps S22 to S25, until the operation is successful or does not meet the judgment condition of step S22.

S3. Determine whether the encryption or decryption processing operation is successful, and return the final operation status to the user to complete the automatic identification and encryption operation. The step S3 includes:

S31. If the encryption or decryption operation is successful, the operation success status is returned;

S32. If the encryption or decryption operation fails, try to roll back to the state before the encryption or decryption operation of the video file;

S33. If the rollback operation is successful, the operation failure status is returned, and if the rollback operation fails, the unrecoverable status is returned.

This solution further discloses an automatic identification encryption and decryption system for video data transmission, the system comprising:

The file identification unit obtains the video file transmission request, and confirms the path of the video file to be transmitted and the current state of the video file to be transmitted, that is, three states of encrypted, decrypted or unprocessed;

The encryption unit, according to the user's encryption or decryption instruction, encrypts or decrypts the current video file to be transmitted; the encryption unit includes:

The initialization module initializes the maximum number of attempted encryption or decryption operations maxCount, the current count of encryption or decryption operations, and the initial state of the video encryption or decryption result;

The first judgment module determines whether to try to encrypt the video file to be transmitted through judgment conditions: whether the encryption or decryption state is an operation failure state and the current encryption or decryption times count is less than the maximum attempted encryption or decryption operation times maxCount; if the judgment conditions are met , then the operation identification of the encryption or decryption operation is set for the video file, if the judgment condition is not satisfied, then the operation state determined by the state feedback unit is returned to the user;

The operation identification setting module is used to set the operation identification of the encryption or decryption operation for the video file, and judge whether the operation identification setting is successful. If successful, the user-specified content encryption or decryption operation is performed. If it fails, the number of attempts to encrypt or decrypt the operation count is counted. Add 1, and repeat the operation of the first judgment module and the operation identification setting module in the steps until the identification is successful or does not meet the judgment condition of the first judgment module;

Specify the content processing module to encrypt or decrypt the content in the specified location of the video file to be transmitted according to user needs;

The second judgment module judges whether the encryption or decryption operation is successful. If successful, the encryption or decryption operation of the video file to be transmitted is completed. If it fails, the first judgment module, the operation identification setting module, the specified content processing module and the first judgment module are executed The second judging module operates until the operation succeeds or the judging conditions of the first judging module are not satisfied.

The status feedback unit determines whether the encryption or decryption processing operation is successful, and returns the final operation status to the user to complete the automatic identification and encryption operation. The state feedback unit includes:

The encryption result judgment module, if the encryption or decryption operation is successful, returns the operation success status, if the encryption or decryption operation fails, it tries to roll back to the state before the encryption or decryption operation of the video file;

The rollback result judgment module, if the rollback operation is successful, it will return the operation failure status, and if the rollback operation fails, it will return the unrecoverable status.

This solution can be written in C/C++ language to generate a dynamic library that can be called in the system environment for the video software to call. For example, a dynamic library so file that can be called in the Android environment is generated for the video software in the Android environment to be called. If the conventional code is used in this solution, the storage space is 104k, and if the library file is compiled and generated, the storage space is about 30k, which is more suitable for the quick invocation of the server or other related video playback software.

The present invention is further described below by a group of embodiments:

As shown in FIG. 1 , the present invention provides an automatic identification encryption and decryption method for video data transmission. The specific steps of this method are as follows:

In step S1, the transmitted parameters, including the path of the video file to be encrypted or decrypted, and specific operation instructions are obtained and processed; wherein, the specific operation instructions are to check the encryption and decryption status, encryption operation and decryption operation of the video file. If the operation instruction is to check the encryption and decryption state of the video file, step S2 is performed.

In step S2, the state of the video file will be judged, and the returned state includes three states: encrypted, decrypted and unprocessed. The encrypted state indicates that the target video is now encrypted and needs to be decrypted to be viewed normally; the decrypted state indicates that the target video is now decrypted and can be browsed; the unprocessed state indicates that the video has never been encrypted or decrypted.

If the operation instruction is to encrypt or decrypt the video video file, step S3 is executed.

Step S2 will encrypt or decrypt the video file according to the instructions. After the operation is completed, execute S3 to return the execution result of the encryption/decryption operation. The result is classified as a function of encryption or decryption. Roll back the state before the operation of the video file; the video file cannot be restored. When the encryption or decryption fails, and the rollback operation also fails, the status flag will be returned. When the operation instruction is to encrypt or decrypt the video file, step S3 is performed.

The specific encryption or decryption process in step S2 is the local loop encryption or decryption method constructed by this scheme, and the specific execution steps of the method include:

S21, initialize the maximum number of attempted encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result;

S22, through the judgment condition: whether the encryption or decryption state is an operation failure state and the current count of encryption or decryption times is less than the maximum number of attempted encryption or decryption operations maxCount, determine whether to try to encrypt the video file to be transmitted; if the judgment condition is met, execute Step S23, if the judgment condition is not met, step S3 is executed;

S23, set the operation identifier of the encryption or decryption operation for the video file, and determine whether the operation identifier is set successfully, if successful, then perform step S24, if it fails, then try to encrypt or decrypt the operation count plus 1, and repeat steps S22 and S23 , until the identification succeeds or the judgment condition of step S22 is not satisfied;

S24. According to user requirements, encrypt or decrypt the content of the specified location of the video file to be transmitted;

S25, determine whether the encryption or decryption operation is successful, if successful, then complete the encryption or decryption operation of the video file to be transmitted, if it fails, then execute steps S22 to S25, until the operation is successful or does not meet the judgment condition of step S22.

The S24 includes:

S241, take the head 1024 bytes of the video file to be transmitted as the object of encryption or decryption;

S242, set the initial position as site=0;

S243: Determine whether the encryption of the header 1024 bytes of the current video file to be transmitted is completed, if not, extract 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take out 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data; if the read data fails or the encryption/decryption operation fails, exit directly;

S244. Write the encrypted or decrypted data to the site, and exit if the writing fails;

S245, take 16 bytes from the 1024 bytes, that is, site=site+16, and repeat steps S243 to S245 until the encryption or decryption of the 1024-byte data is completed.

Step S3 is entered when the state is the operation success state, or the number of encrypted or decrypted operations is greater than or equal to the maximum number of attempted encryption or decryption operations.

In step S3, the following operations are performed according to the final result. When the encryption or decryption operation is successful, the operation success status is returned; when the encryption or decryption operation fails, an attempt is made to roll back to the state before the video file operation. If the rollback is successful, the operation fails to return. Status; if the rollback operation also fails, the unrecoverable status is returned.

The overall video encryption or decryption video file operation is complete.

Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Changes or changes in other different forms cannot be exhausted here, and all obvious changes or changes derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims (8)

1. an automatic identification encryption and decryption method for video data transmission, is characterized in that, the step of this method comprises: S1, obtain the transmission parameters of the video file to be transmitted, and confirm the path of the video file to be transmitted and the current state of the video file to be transmitted; S2. Encrypt or decrypt the current video file to be transmitted according to the user's encryption or decryption instruction; S3. Determine whether the encryption or decryption processing operation is successful, and return the final operation status to the user to complete the automatic identification and encryption operation; Step S2 includes: S21, initialize the maximum number of attempted encryption or decryption operations maxCount, the current number of encryption or decryption operations count, and the initial state of the video encryption or decryption result; S22, through the judgment condition: whether the encryption or decryption state is an operation failure state and the current count of encryption or decryption times is less than the maximum number of attempted encryption or decryption operations maxCount, determine whether to try to encrypt the video file to be transmitted; if the judgment condition is met, execute Step S23, if the judgment condition is not met, step S3 is executed; S23, set the operation identifier of the encryption or decryption operation for the video file, and determine whether the operation identifier is set successfully, if successful, then perform step S24, if it fails, then try to encrypt or decrypt the operation count plus 1, and repeat steps S22 and S23 , until the identification succeeds or the judgment condition of step S22 is not satisfied; S24. According to user requirements, encrypt or decrypt the content of the specified location of the video file to be transmitted; S25, determine whether the encryption or decryption operation is successful, if successful, then complete the encryption or decryption operation of the video file to be transmitted, if it fails, then execute steps S22 to S25, until the operation is successful or does not meet the judgment condition of step S22. 2 . The method according to claim 1 , wherein the current state of the video file to be transmitted includes three states: encrypted, decrypted and unprocessed. 3 . 3. The method according to claim 1, wherein step S24 comprises: S241, take the head 1024 bytes of the video file to be transmitted as the object of encryption or decryption; S242, set the initial position as site=0; S243: Determine whether the encryption of the header 1024 bytes of the current video file to be transmitted is completed, if not, extract 16 bytes of data from the 1024 bytes, and encrypt the 16 bytes of data, if completed Encryption, take out 16 bytes of data from 1024 bytes, and decrypt the 16 bytes of data; S244. Write the encrypted or decrypted data to the site, and exit if the writing fails; S245, take 16 bytes from the 1024 bytes, that is, site=site+16, and repeat steps S243 to S245 until the encryption or decryption of the 1024-byte data is completed. 4. The method according to claim 3, wherein in step S243, if the data read fails or the encryption/decryption operation fails, exit directly. 5. The method according to claim 1, wherein step S3 comprises: S31. If the encryption or decryption operation is successful, the operation success status is returned; S32. If the encryption or decryption operation fails, try to roll back to the state before the encryption or decryption operation of the video file; S33. If the rollback operation is successful, the operation failure status is returned, and if the rollback operation fails, the unrecoverable status is returned. 6. an automatic identification encryption and decryption system for video data transmission, is characterized in that, this system comprises: The file identification unit obtains the video file transmission request, and confirms the path of the video file to be transmitted and the current state of the video file to be transmitted; The encryption unit, according to the user's encryption or decryption instruction, encrypts or decrypts the current video file to be transmitted; The state feedback unit judges whether the encryption or decryption processing operation is successful, and returns the final operation state to the user to complete the automatic identification and encryption operation; The encryption unit includes: The initialization module initializes the maximum number of attempted encryption or decryption operations maxCount, the current count of encryption or decryption operations, and the initial state of the video encryption or decryption result; The first judgment module determines whether to try to encrypt the video file to be transmitted through judgment conditions: whether the encryption or decryption state is an operation failure state and the current encryption or decryption times count is less than the maximum attempted encryption or decryption operation times maxCount; if the judgment conditions are met , then the operation identification of the encryption or decryption operation is set for the video file, if the judgment condition is not satisfied, then the operation state determined by the state feedback unit is returned to the user; The operation identification setting module is used to set the operation identification of the encryption or decryption operation for the video file, and judge whether the operation identification setting is successful. If successful, the user-specified content encryption or decryption operation is performed. If it fails, the number of attempts to encrypt or decrypt the operation count is counted. Add 1, and repeat the operation of the first judgment module and the operation identification setting module in the steps until the identification is successful or does not meet the judgment condition of the first judgment module; Specify the content processing module to encrypt or decrypt the content in the specified location of the video file to be transmitted according to user needs; The second judgment module judges whether the encryption or decryption operation is successful. If successful, the encryption or decryption operation of the video file to be transmitted is completed. If it fails, the first judgment module, the operation identification setting module, the specified content processing module and the first judgment module are executed The second judging module operates until the operation succeeds or the judging conditions of the first judging module are not satisfied. 7. The system according to claim 6, wherein the current state of the video file to be transmitted includes three states: encrypted, decrypted and unprocessed. 8. The system according to claim 6, wherein the state feedback unit comprises: The encryption result judgment module, if the encryption or decryption operation is successful, returns the operation success status, if the encryption or decryption operation fails, it tries to roll back to the state before the encryption or decryption operation of the video file; The rollback result judgment module, if the rollback operation is successful, it will return the operation failure status, and if the rollback operation fails, it will return the unrecoverable status.