Data encryption and decryption method based on uniform distribution symmetry algorithm

Abstract

The invention provides a data encryption and decryption method based on a uniform distribution symmetry algorithm, and the method comprises the following steps: 1, obtaining a hash sequence of a secret key according to the secret key set by a user, and calculating a displacement weight value corresponding to the hash sequence; 2, performing shift encryption on the plaintext according to the displacement weight value to obtain a shift ciphertext, and performing Base64 encryption on the shift ciphertext to enable the ciphertext to be an ASCII code sequence to obtain a Base64 ciphertext; 3, generating an obfuscated sequence according to the hash sequence, enabling the obfuscated sequence to be an ASCII code sequence, and inserting the obfuscated sequence into the Base64 ciphertext to obtain aformal ciphertext; the problems that in the verification process of the digital certificate and the block chain, the encrypted data is easy to steal, and the risk is high are solved.

Description

technical field [0001] The invention relates to the field of data encryption and decryption, in particular to a data encryption and decryption method based on a uniform distribution symmetric algorithm. Background technique [0002] During the verification process of digital certificates and blockchains, a pair of matching keys is used to encrypt and decrypt confidential files to ensure file security. At present, the commonly used encryption and decryption methods are mostly based on symmetric algorithms such as DES, 3DES, RC5, IDEA, and SM1. [0003] Among them, the DES algorithm is a symmetric cryptographic system in the cryptographic system, also known as the American Data Encryption Standard. The plaintext is grouped by 64 bits, and the key length is 64 bits. In fact, the key is 56 bits to participate in the DES operation (8th, 16th) , 24, 32, 40, 48, 56, and 64 bits are check bits, so that each key has an odd number of 1) the plaintext after grouping and the 56-bit key...

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a data encryption and decryption method based on a uniformly distributed symmetric algorithm, which is used to solve the problem that encrypted data is easily stolen during the verification process of digital certificates and blockchains. take, the problem of higher risk

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