MD5-based two-way encryption data protection method

Abstract

This case is a two-way encrypted data protection method based on MD5, including: key processing process, encryption process, and decryption process. Among them, the key processing process: transcoding the key with md5 and base64; intercepting it; The pseudo-random algorithm processes and converts the string into a key box; the encryption process: convert the plaintext string into ASCII code, cycle ASCII code, and arrange pseudo-randomly through the algorithm; intercept the generated checksum during the additional key processing Check the ASCII code value of the string; loop the bitwise XOR to convert it into a string; transcode the generated string through base64 to obtain the ciphertext string; decryption process: base64 decode the ciphertext string, ASCII code processing; cyclic bitwise XOR operation; match the verification part with the verification sequence, if inconsistent, the verification will fail; the above ciphertext ASCII code string and the key box are obtained by performing cyclic bitwise XOR operation The ASCII code string is converted into a string and reversely executed as a randomization process, and finally a plaintext string is obtained.

Description

technical field [0001] The invention relates to the field of data encryption, in particular to an MD5-based two-way encrypted data protection method. Background technique [0002] MD5 data single-entry encryption technology: the full name of this technology is Message-DigestAlgorithm5 (information-digest algorithm), which allows large-capacity information to be "compressed" into a confidential format before signing the private key with digital signature software. From a technical point of view , is to convert a string of any length into a fixed-length hexadecimal super large integer. MD5 is one-way encryption, that is to say, it is impossible for the string generated after encryption to be decrypted in turn. [0003] In actual work, the role of MD5 is mainly to verify encrypted signatures: for example, user login verification, which is to match the verification string encrypted by MD5 with the existing encrypted string stored in the system according to the login password. ...

AI Technical Summary

Problems solved by technology

However, MD5 is a single-item encryption method. In practical applications, the encrypted data needs to be decrypted in many places. In such cases, the MD5 encryption method cannot meet the requirements. RSA encryption and decryption method

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