Method and device for data encryption and data decryption

Abstract

The invention discloses a method and a device for data encryption and data decryption, wherein the encryption device comprises a rectangle generation module of data, a rectangle inscribed graph generation module and a data encryption module. the rectangle generation module of data is used for generating a rectangle based on a total byte number of data; the product of the length and the width of the rectangle is equal to the total byte number or the sum of the total byte number and one; the rectangle is divided into a plurality of lattices; total bytes are uniformly distributed in each lattice according to a rule; the rectangle inscribed graph generation module is used for determining rectangle inscribed graph parameters and determining an inscribed graph based on the inscribed parameters; the data encryption module is used for carrying out encryption for data of an intersection set between the rectangle and the inscribed graph; the intersection set refers to the lattices in the rectangle on which an inscribed graph trajectory passes . According to the invention, complexity of encryption calculation and decryption calculation is reduced, and real-time response performance of data encryption and data decryption is improved.

Description

technical field [0001] The present invention relates to the technical field of data encryption and decryption, in particular to a data encryption and decryption method and device. Background technique [0002] For a long time, the dissemination of digital media has faced the problem of being pirated, especially in the Internet environment, this problem is particularly serious. Therefore, the owners and distributors of digital media take various measures to prevent or delay the illegal proliferation and dissemination of digital media with formal copyrights, so as to protect their own interests. [0003] One traditional way of controlling is to take the method of controlling distribution channels, in which digital fingerprints are embedded in digital content. For different buyers, digital fingerprints are different. Once content piracy is found, the source of dissemination can be known through the identification of digital fingerprints. However, if this method is to have su...

AI Technical Summary

Problems solved by technology

The encryption and decryption operation complexity of this method is also high

[0005] In the current network environment, an indicator to measure the content encryption / decryption algorithm is the real-time performance of the algorithm. The encryption and decryption algorithms used in the previous encryption methods have high computational complexity. Decrypting compressed data on lightweight devices is especially important for decrypting When compressing video data, there is a decryption real-time response problem

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