Method and device for single-byte symmetric encryption and decryption, and readable medium

Abstract

The invention relates to a method and a device for single-byte symmetric encryption and decryption, and a readable medium. The single-byte symmetric encryption and decryption method comprises an encryption step and a decryption step, and is characterized in that the encryption step comprises the steps of loading plaintext file data, randomly generating a key to encrypt each byte of data of a plaintext, and outputting the encrypted file data to a ciphertext file to obtain a ciphertext file; and the decryption step comprises the steps of calling the randomly generated corresponding key in a memory space to decrypt the ciphertext file, and converting the obtained plaintext data in the memory space into a plaintext file. The method has the following advantages: the file data is effectively encrypted and decrypted, and the confidentiality of the file is effectively protected.

Description

technical field [0001] The invention belongs to the field of computer data encryption and decryption, and in particular relates to a single-byte symmetric encryption and decryption method, device and readable medium. Background technique [0002] The symmetric encryption algorithm is an earlier encryption algorithm with mature technology. In the symmetric encryption algorithm, the data sender processes the plaintext and the encryption key together with a special encryption algorithm, turning it into complex encrypted ciphertext and sending it out. After the recipient receives the ciphertext, if he wants to interpret the original text, he needs to use the encrypted key and the inverse algorithm of the same algorithm to decrypt the ciphertext to restore it to readable plaintext. [0003] Both parties to the transaction of the existing symmetric encryption and decryption method use the same key, and the security cannot be guaranteed; every time a pair of users uses the symmetr...

AI Technical Summary

Problems solved by technology

Symmetric encryption algorithms are difficult to use in distributed network systems, mainly because key management is difficult, the cost of use is high, and the confidentiality of encrypted and decrypted files is poor, and the efficiency of loading and reading files is low

[0004] On mobile phones and low-end devices, the performance of loading files will be greatly affected, which will cause the game screen to freeze and reduce the user experience.

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