Method capable of achieving data sectional encryption and decryption

Abstract

The invention discloses a method capable of achieving data sectional encryption and decryption. The method comprises the steps as follows: S101, an encryption module receives an encryption root key and data to be encrypted; S102, the encryption module analyzes the data to be encrypted, obtains the length of each data section, encryption algorithm, an encryption sequence and encryption data, and divides the data to be encrypted into a plurality of data sections; S103, whether the number of the data sections is larger than 1 is judged, if yes, S105 is carried out, and if not, S104 is carried out; S104, the data to be encrypted is encrypted by the encryption root key; S105, the first encryption sequence data section is encrypted by the encryption root key; S106, the posterior data sections are encrypted by utilizing the previous data sections in sequence; S107, whether all the data sections are encrypted is judged, if yes, S108 is carried out, and if not, the S106 is carried out; and S108, according to the sequence of each data section which is in the data to be encrypted, the encryption results of data sections are combined and then output. The invention has the advantages of high security and flexibility in use.

Description

technical field [0001] The invention belongs to the field of data security, and in particular relates to a method for realizing segmental encryption and decryption of data. 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 necess...

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve the problems of low security of single encryption of data and complex implementation of multiple encryptions in the prior art, and proposes a method for realizing segmental encryption and decryption of data, which divides the data to be encrypted into multiple segments, and Each section of data is encrypted successively, and the number of times of data encryption, encryption algorithm and encryption order can be changed conveniently, which improves the security of data and is flexible to use

Images