Chaos synchronization encrypting/decrypting method and device using data compression encoding

Abstract

The invention discloses a chaos synchronization encrypting / decrypting method and device using data compression encoding. The device comprises a random number generator, a public key cryptography encipher, a public key cryptography decipher, a dynamical probability counter, an entropy encoder and an entropy decoder. The method comprises the steps of taking the entropy encoder and the dynamical probability counter used for the data compression as a chaotic dynamics system; enabling a compression coding process to form a chaotic cryptology encryption process; combining the public key cryptography encipher with the chaotic dynamics system, wherein after a randomly generated session key is encrypted in an asymmetrical encryption manner by a sender, the session key is sent to a receiver; initializing the respective chaotic dynamics system through the respective session key the sender and the receiver so that the system states of the sender and the receiver are synchronous; carrying out data compression encoding through the initialized system by the sender; and carrying out data uncompressing through a system with consistent state by the receiver. The method and the device provided by the invention support overlong session key and improve the encryption safety; and simultaneously, the encryption speed is not affected by the key length.

Description

technical field [0001] The invention relates to the information security technology of data encryption and decryption coding, in particular to a method and device for encryption and decryption by using data compression. Background technique [0002] The 21st century is an era of informatization, information security is related to the national economy and people's livelihood, and information coding is the basic technology of information security. There are three cores in the field of information coding technology: 1. Source coding, which mainly corresponds to data compression; 2. Security coding, which mainly corresponds to data encryption; 3. Channel coding, which mainly corresponds to data error correction coding. The present invention relates to data compression and encryption technology, and is related to chaos cryptography, public key cryptography and entropy coding knowledge of lossless compression. [0003] Chaotic cryptography is the combination of chaotic dynamics i...

AI Technical Summary

Problems solved by technology

[0014] Disadvantages: How to safely distribute and transmit the key K to the decryption party is a difficult problem. When multiple parties use different keys for encryption and decryption, key management and security protection will also become difficult problems

[0018] Disadvantages: Compared with single-key encryption technology, the operation speed is relatively slow under the same key length, and the encryption strength is relatively low

[0022] Disadvantage: The encryption speed will still decrease as the key length grows, so the key K cannot be made very long without affecting performance

[0026] Disadvantages: It still belongs to single-key encryption technology, so there are also difficulties in key management and safe distribution and transmission

With the development of technology, the lower limit of the length of the ultra-long key may be extended

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