CN105812146A - MD5-based two-way encryption data protection method - Google Patents
MD5-based two-way encryption data protection method Download PDFInfo
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- CN105812146A CN105812146A CN201610356831.1A CN201610356831A CN105812146A CN 105812146 A CN105812146 A CN 105812146A CN 201610356831 A CN201610356831 A CN 201610356831A CN 105812146 A CN105812146 A CN 105812146A
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- 238000000034 method Methods 0.000 title claims abstract description 81
- 238000012795 verification Methods 0.000 claims description 12
- 101100042793 Gallus gallus SMC2 gene Proteins 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
- H04L9/3239—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Storage Device Security (AREA)
Abstract
The invention relates to an MD5-based two-way encryption data protection method, comprising: a key processing process, an encryption process and a decryption process, wherein the key processing process includes: subjecting a key to MD5 and BASE64 transcoding; intercepting the key; processing with a pseudorandom algorithm and converting a character string into a key box; the encryption process includes: converting a plaintext character string into ASCII code, circulating the ASCII code, and carrying out pseudorandom arrangement through an algorithm; adding ASCII code value of a check character string generated by intercepting in the key processing process; performing circulating bitwise XOR to convert the value into a character string; subjecting the generated character string to BASE64 transcoding to obtain a cyphertext character string; the decryption process includes: subjecting the cyphertext character string to BASE64 decoding, and carrying out ASCII coding; performing circulating bitwise XOR operation; matching a check portion with a check sequence, failing the check in case of inconformity; subjecting the cyphertext ASCII code string and the key box to circulating bitwise XOR operation to convert the obtained ASCII code string into a character string, and reversely executing as a random process to finally obtain a plaintext character string.
Description
Technical field
The present invention relates to field of data encryption, particularly relate to a kind of two-way encryption data guard method based on MD5.
Background technology
MD5 data individual event encryption technology: this technology full name is Message-DigestAlgorithm5 (md5-challenge), it can allow Large Copacity information be become the form of a kind of secrecy before signing private secret key with digital signature software by " compression ", technically, it is simply that the character string of random length is converted to the very large integer of 16 systems of fixed length.MD5 is One-Way Encryption, say, that after encryption produce character string impossible, in turn decrypted fall.
In real work, the effect of MD5 is mainly ciphering signature checking: such as user login validation, it is simply that the existing encrypted characters string stored with system according to the checking character string of login password md5 encryption mates, and is unanimously then verified；The relatively common example application of another one is the network transmission of file, a lot of software is had to have a filename identical when downloading, the file of file extent .MD5 by name, only has a line text in this document, and this style of writing is originally exactly the digital signature of file.A big text message is used as by whole file by MD5, by its irreversible character string mapping algorithm, creates this unique MD5 informative abstract.If propagating in the process of this file afterwards, no matter the content of file there occurs any type of change (including the error of transmission etc. that in artificial amendment or downloading process, circuit instability causes), as long as it finds that informative abstract differs when this file is recalculated MD5, it is possible to judge that this file is tampered.MD5 advantage: compare DES, AES encryption algorithm, md5 encryption algorithm has higher efficiency, and the safety of MD5 is higher simultaneously.But, MD5 is a kind of individual event encryption method, in practical application, data after encryption are decrypted by a lot of local needs, and this kind of situation, md5 encryption method can not meet requirement, now generally requires the encipher-decipher method based on RSA bigger by performance consumption.
Summary of the invention
For overcoming the deficiencies in the prior art, it is an object of the invention to provide the two-way encryption data guard method based on MD5 that a kind of safety is good.
For achieving the above object, the present invention is achieved through the following technical solutions:
A kind of two-way encryption data guard method based on MD5, including: key handling process, ciphering process, decrypting process, wherein,
Key handling process includes: key carries out md5 and base64 transcoding and processes, obtain encryption and decryption private key；Above-mentioned encryption and decryption private key is intercepted, generates the string of checking character of fixing figure place, for the verification operation in follow-up encryption process；Process above-mentioned encryption and decryption private key with pseudo-random algorithm, again upset its order, and this character string is converted to ASCII character, i.e. keylockers, treat follow-up encrypting and decrypting process uses；
Ciphering process includes: first plaintext character string transfers to ASCII character, circulation A SCII code, carries out pseudorandom arrangement by algorithm；In the pseudo-random sequence of above-mentioned plaintext ASCII character string afterbody, add the ASCII character value intercepting the string of checking character generated in key handling process；The pseudo-random sequence containing verification that previous step is generated, the keylockers circulation step-by-step XOR with obtaining in key generation process, obtain new ASCII character string, then transferred to character string；The character string generated in previous step is obtained ciphertext character string through base64 transcoding；
Decrypting process includes: first ciphertext character string carries out base64 decoding operation, and the character string obtained carries out ASCII character process again, obtains ciphertext ASCII character string；Ciphertext ASCII character string previous step generated is circulated step-by-step xor operation with described keylockers；Check part in previous step result is mated with the verification sequence generated in key handling process, if consistent, continue next step and process, inconsistent, by verification failure and return null value；When previous step coupling is consistent, above-mentioned ciphertext ASCII character string and described keylockers is circulated the ASCII character string that step-by-step xor operation obtains and transfers character string to and reverse execution is randomisation process, and finally give expressly character string..
Beneficial effects of the present invention: by original md5 encryption method, transform under the cooperation of other technologies, becomes a kind of encryption method that can support deciphering；Its safety is consistent with md5 encryption method, but can accomplish the md5 decrypting process that cannot realize；The method can realize it is critical only that of deciphering, in ciphering process, the md5 of encryption and decryption key adds the ASCII character of confidential information and the ASCII character XOR of encrypted character string, thus the feature of key md5 code is embedded in encrypted character string, and final acquisition encrypted characters string；The process used ensure that the safety of encryption and decryption key.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the two-way encryption data guard method based on MD5 described in one embodiment of the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to description word.
A kind of two-way encryption data guard method based on MD5, refers to accompanying drawing 1, including: key handling process, ciphering process, decrypting process, wherein,
Key handling process includes: key carries out md5 and base64 transcoding and processes, obtain encryption and decryption private key；Above-mentioned encryption and decryption private key is intercepted, generates the string of checking character of fixing figure place, for the verification operation in follow-up encryption process；Process above-mentioned encryption and decryption private key with pseudo-random algorithm, again upset its order, and this character string is converted to ASCII character, i.e. keylockers, treat follow-up encrypting and decrypting process uses；
Ciphering process includes: first plaintext character string transfers to ASCII character, circulation A SCII code, carries out pseudorandom arrangement by algorithm；In the pseudo-random sequence of above-mentioned plaintext ASCII character string afterbody, add the ASCII character value intercepting the string of checking character generated in key handling process；The pseudo-random sequence containing verification that previous step is generated, the keylockers circulation step-by-step XOR with obtaining in key generation process, obtain new ASCII character string, then transferred to character string；The character string generated in previous step is obtained ciphertext character string through base64 transcoding；
Decrypting process includes: first ciphertext character string carries out base64 decoding operation, and the character string obtained carries out ASCII character process again, obtains ciphertext ASCII character string；Ciphertext ASCII character string previous step generated is circulated step-by-step xor operation with described keylockers；Check part in previous step result is mated with the verification sequence generated in key handling process, if consistent, continue next step and process, inconsistent, by verification failure and return null value；When previous step coupling is consistent, above-mentioned ciphertext ASCII character string and described keylockers is circulated the ASCII character string that step-by-step xor operation obtains and transfers character string to and reverse execution is randomisation process, and finally give expressly character string.
Ultimate principle: character string to be encrypted and encryption and decryption key need each to carry out pseudorandom permutation, md5 encryption, base64 transcoding, ASCII character serializings etc. operate, both ASCII character XORs are become new sequence, now add confidential information and be included in ASCII sequence, this sequence is carried out the character string after anti-ASCII serializing operation can be encrypted.During deciphering, utilize ciphertext character string and encryption and decryption key, reverse execution ciphering process.The method can realize it is critical only that of deciphering, in ciphering process, the md5 of encryption and decryption key adds the ASCII character of confidential information and the ASCII character XOR of encrypted character string, thus the feature of key md5 code is embedded in encrypted character string, and final acquisition encrypted characters string.So the process used must assure that the safety of encryption and decryption key.
Although embodiment of the present invention are disclosed as above, but listed utilization that it is not restricted in description and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited to specific details and shown here as the legend with description.
Claims (1)
1. the two-way encryption data guard method based on MD5, it is characterised in that including: key handling process, ciphering process, decrypting process, wherein,
Key handling process includes: key carries out md5 and base64 transcoding and processes, obtain encryption and decryption private key；Above-mentioned encryption and decryption private key is intercepted, generates the string of checking character of fixing figure place, for the verification operation in follow-up encryption process；Process above-mentioned encryption and decryption private key with pseudo-random algorithm, again upset its order, and this character string is converted to ASCII character, i.e. keylockers, treat follow-up encrypting and decrypting process uses；
Ciphering process includes: first plaintext character string transfers to ASCII character, circulation A SCII code, carries out pseudorandom arrangement by algorithm；In the pseudo-random sequence of above-mentioned plaintext ASCII character string afterbody, add the ASCII character value intercepting the string of checking character generated in key handling process；The pseudo-random sequence containing verification that previous step is generated, the keylockers circulation step-by-step XOR with obtaining in key generation process, obtain new ASCII character string, then transferred to character string；The character string generated in previous step is obtained ciphertext character string through base64 transcoding；
Decrypting process includes: first ciphertext character string carries out base64 decoding operation, and the character string obtained carries out ASCII character process again, obtains ciphertext ASCII character string；Ciphertext ASCII character string previous step generated is circulated step-by-step xor operation with described keylockers；Check part in previous step result is mated with the verification sequence generated in key handling process, if consistent, continue next step and process, inconsistent, by verification failure and return null value；When previous step coupling is consistent, above-mentioned ciphertext ASCII character string and described keylockers is circulated the ASCII character string that step-by-step xor operation obtains and transfers character string to and reverse execution is randomisation process, and finally give expressly character string.
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| CN201610356831.1A CN105812146A (en) | 2016-05-26 | 2016-05-26 | MD5-based two-way encryption data protection method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106131049A (en) * | 2016-08-15 | 2016-11-16 | 福建中金在线信息科技有限公司 | A kind of method of data transmission encryption and decryption |
| CN106603485A (en) * | 2016-10-31 | 2017-04-26 | 美的智慧家居科技有限公司 | Secret key negotiation method and device |
| CN106789975A (en) * | 2016-12-07 | 2017-05-31 | 广东京奥信息科技有限公司 | A kind of method of the text encryption transmission with byte stream is preserved |
| CN108124480A (en) * | 2016-12-27 | 2018-06-05 | 深圳配天智能技术研究院有限公司 | A kind of software authorization method, system and equipment |
| CN110046524A (en) * | 2019-04-16 | 2019-07-23 | 昆山丘钛微电子科技有限公司 | A kind of processing method of data, device, electronic equipment and medium |
| CN111314053A (en) * | 2018-12-12 | 2020-06-19 | 上海领甲数据科技有限公司 | A Data Encryption and Decryption Method Based on Uniformly Distributed Symmetric Algorithm |
| CN112235098A (en) * | 2020-09-17 | 2021-01-15 | 成都万江港利科技股份有限公司 | A Simple and Fast Communication Encryption and Decryption Algorithm |
| CN114065304A (en) * | 2021-12-02 | 2022-02-18 | 四三九九网络股份有限公司 | JSON data encryption and decryption method |
| CN117315808A (en) * | 2023-11-28 | 2023-12-29 | 成都博瑞科传科技有限公司 | Water quality portable inspection instrument and collection method based on data integrity verification |
| CN118523910A (en) * | 2024-07-16 | 2024-08-20 | 天津市天益达科技发展有限公司 | Multimedia data stream transmission encryption method and system |
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| CN111314053A (en) * | 2018-12-12 | 2020-06-19 | 上海领甲数据科技有限公司 | A Data Encryption and Decryption Method Based on Uniformly Distributed Symmetric Algorithm |
| CN111314053B (en) * | 2018-12-12 | 2023-02-10 | 上海领甲数据科技有限公司 | Data encryption and decryption method |
| CN110046524A (en) * | 2019-04-16 | 2019-07-23 | 昆山丘钛微电子科技有限公司 | A kind of processing method of data, device, electronic equipment and medium |
| CN112235098A (en) * | 2020-09-17 | 2021-01-15 | 成都万江港利科技股份有限公司 | A Simple and Fast Communication Encryption and Decryption Algorithm |
| CN112235098B (en) * | 2020-09-17 | 2023-02-10 | 成都万江港利科技股份有限公司 | A Simple and Rapid Communication Encryption and Decryption Method |
| CN114065304A (en) * | 2021-12-02 | 2022-02-18 | 四三九九网络股份有限公司 | JSON data encryption and decryption method |
| CN114065304B (en) * | 2021-12-02 | 2024-05-28 | 四三九九网络股份有限公司 | JSON data encryption and decryption method |
| CN117315808A (en) * | 2023-11-28 | 2023-12-29 | 成都博瑞科传科技有限公司 | Water quality portable inspection instrument and collection method based on data integrity verification |
| CN117315808B (en) * | 2023-11-28 | 2024-02-13 | 成都博瑞科传科技有限公司 | Water quality portable inspection instrument and collection method based on data integrity verification |
| CN118523910A (en) * | 2024-07-16 | 2024-08-20 | 天津市天益达科技发展有限公司 | Multimedia data stream transmission encryption method and system |
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