Magic cube encryption and decryption method

Abstract

The invention discloses a magic cube encryption method, which belongs to the technical field of computer information security. The method is characterized in that a key is specially defined, each character in a key character string is used for expressing one rotary operation of a magic cube, and the rotary operation corresponds to a transposition rule of a series of magic cube diamond sequence numbers; one character in the key is sequentially obtained from left to right in encryption, a series of transposition is carried out on bit number values of a plaintext according to the transposition rule set by the character, exclusive or operation is performed by utilizing a letter after being circularly moved leftwards or rightwards, and finally a ciphertext is obtained. The invention also provides a decryption method based on the encryption method, and the decryption process is the invert operation of the encryption operation process. Due to the adoption of the rotation concept of the magic cube, the decryption speed is fast, the key length is not restricted, the encryption strength is large, the ciphertex highly depends on the key, so that different decipher methods such as password attack and enumeration attack can be prevented.

Description

technical field [0001] The invention belongs to the technical field of information security in computers, is a general data encryption and decryption method, and is applied in the fields of computer security, communication security, national defense and the like. Background technique [0002] The basic process of data encryption is to process the original plaintext file or data according to a certain algorithm to make it an unreadable piece of code, usually called "ciphertext", so as to protect the data from being illegally stolen and read. The reverse process of this process is decryption, that is, the process of restoring ciphertext information to plaintext. [0003] Encryption methods generally fall into two broad categories: "symmetric" encryption methods and "asymmetric" encryption methods. [0004] Symmetric encryption methods mainly include: DES (Data Encryption Standard), data encryption standard, fast, suitable for the occasion of encrypting a large amount of data;...

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes an encryption method with unlimited key length and sufficiently high encryption strength, so as to solve the possibility that the encrypted ciphertext is cracked by a computer with extremely fast performance using methods such as exhaustive enumeration and password attack.

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