Multistage data encryption and decryption methods

Abstract

The invention discloses a multistage data encryption method and a multistage data decryption method. The multistage data encryption method comprises the following steps that: 101, an encryption module receives an encryption root key, encryption control information and data to be encrypted; 102, the encryption module resolves the encryption control information to obtain the number of encryption times, the length of data of each segment, an encryption algorithm and an encryption sequence; 103, the encryption module judges whether the number of encryption times is more than 1, executes a step 104 if the number of encryption times is more than 1, and executes a step 105 if the number of execution times is not more than 1; 104, the encryption module encrypts the data to be encrypted by utilizing the encryption root key, and outputs an encryption result; 105, the encryption module obtains a plurality of data segments corresponding to the number of encryption times in the data to be encrypted, and encrypts a first data segment to be encrypted by using the encryption root key; 106, the encryption module sequentially encrypts the next data segments to be encrypted by using the previous data segments to be encrypted; 107, the encryption module judges whether all the data segments are encrypted or not, executes a step 108 if all the data segments are encrypted, and executes the step 106 if not all the data segments are encrypted; and 108, the encryption module combines encryption results according to the sequence of each data segment in the data to be encrypted, and outputs a combined encryption result. The methods have the advantages of high security, convenience and flexibility in implementation and the like, and are easy to extend.

Description

technical field [0001] The invention belongs to the field of data security, and in particular relates to a data multi-level encryption and decryption method. Background technique [0002] With the rapid development of information technology and network technology, data security has become more and more important. Data security mainly refers to the security of data itself and the security of data transmission. Data transmission security means that the data must ensure the security, integrity and non-tampering of the data during the transmission process. Data encryption is recognized as the only practical method to protect the security of data transmission and an effective method to protect the security of stored data, and it is the most important line of defense in data protection technology. Data encryption refers to transforming sensitive plaintext data into unrecognizable ciphertext data according to a specific cryptographic algorithm and key. When necessary, the cipher...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art, such as the low security of single encryption of data and the complicated implementation of multiple encryptions, the present invention proposes a multi-level data encryption and decryption method, which can realize multiple encryptions of data, And without changing the encryption module and decryption module, the encryption times, encryption algorithm and encryption order of the data can be changed, which improves the security of the data, is convenient to implement, and has low complexity.

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