Encryption method and device, equipment and medium

Abstract

The invention discloses an encryption method and device, equipment and a medium. The encryption method is carried out on each character in a to-be-encrypted plaintext. The encryption method comprisesthe steps of generating an encryption key corresponding to a to-be-encrypted character according to a random seed value of the to-be-encrypted character and an initial key of the to-be-encrypted plaintext; generating a random array according to the random seed value and the encryption key; and replacing the to-be-encrypted character by a character in the random array according to an index number of the character in the random array. According to the embodiments of the invention, byte lengths of a ciphertext and the plaintext are consistent, constraint of a data format is not broken, and when different plaintexts are encrypted, the generated ciphertexts are different, so a data operation error resulting from the same ciphertexts is avoided, and data accuracy is ensured.

Description

technical field [0001] The invention belongs to the field of computers, and in particular relates to an encryption method, device, equipment and medium. Background technique [0002] With the development of mobile communication technology and the growing coverage requirements of special scenarios, more and more emergency sites are put into use. The monitoring and control messages of emergency sites are sensitive, and information security needs to be ensured. Therefore, it is necessary to design a message encryption method. [0003] At present, the encryption method of the message to be sent by the emergency site adopts the normal data encryption method or the data masking method encryption method. Among them, common data encryption is to encrypt XDR sensitive information such as MSISDN by using a general symmetric encryption algorithm, and generate meaningless ciphertexts in the form of ZgPZrDBM / ue87cvdF1rbHg==. Data masking (Data Masking) encryption is the cloning and mask...

AI Technical Summary

Problems solved by technology

[0005] (1) Ordinary data encryption causes the byte length of the generated ciphertext to be larger than the byte length of the original plaintext, which leads to the risk of modification of the existing data system and brings additional costs

[0006] (2) Ordinary encryption methods have low security. Once the password is leaked, the encrypted information can be obtained

[0007] (3) The informa

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