Data encryption and decryption method

Abstract

The invention discloses a data encryption and decryption method, which includes that S101, an encryption module receives encryption root secret key, encryption times and data to be encrypted; S102, the method judges whether the encryption times are larger than 1, if the times are larger than 1, S104 is conducted, if the times are equal to 1, S103 is conducted; S103, the encryption module conducts encryption on received data by utilizing the encryption root secret key and outputs encryption results; S104, the encryption module divides the data to be encrypted into a plurality of segments of data with equal length and corresponding to the encryption times; S105, the encryption module utilizes the encryption root secret key to serve as the secret key of the first segment of data to encrypt the first segment of data; S106, the encryption module sequentially utilizes the previous segments of data as the secret key to encrypt the following segments of data; S107, the method judges whether the segments of data finish encryption or not, if the segments of data finish encryption, S108 is conducted, if not, S106 is conducted; S108, results obtained by encryption of all the segments of data are sequentially combined and then output. The data encryption and decryption method has the advantages of being high in data encryption safety, convenient to achieve, low in complexity, easy to expand and the like.

Description

[0001] technical field [0002] The invention belongs to the field of digital television and data security, in particular to a data encryption and decryption method. Background technique [0003] 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, th...

AI Technical Summary

Problems solved by technology

[0005] 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 data encryption and decryption method, which can realize multiple encryptions of data, and can Without changing the encryption module and decryption module, the number of data encryption times is changed, which improves data security, is convenient to implement, and has low complexity

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