Dynamic ciphering system and method based on broad sense information field

Abstract

The invention provides a dynamic encrypt system based on a generalized information field, which comprises a pseudo-random code generator based on the generalized information field and an encryption and decryption subsystem, wherein the pseudo-random code generator is connected with the encryption and decryption subsystem, and the encryption and decryption subsystem comprises an encryption subsystem and a decryption subsystem. The pseudo-random code generator based on the generalized information field comprises an initial address message IV generating module, an IV normalized module, an m module, a constrained processing module and a key length judgment module which are connected in sequence, wherein the m module is connected with an activity background generating module, and the activity background generating module comprises a physical reconstruction module and a logical reconstruction module. The encryption subsystem and the decryption subsystem both comprise grouping coefficient and round key generating modules, grouping modules, position interchange modules and substitution operation modules. The invention introduces the generalized information field, and realizes the key safety to transfer towards the generalized information field safety; the cryptanalysis resistance is strong.

Description

technical field [0001] The invention relates to the field of cryptography, in particular to a dynamic encryption system and method based on a generalized information domain. Background technique [0002] In recent years, computer network has developed rapidly and is widely used in various fields such as politics, military affairs, economy and science, and more and more information has been effectively transmitted and stored. Due to the openness of the computer network, information may be stolen in the process of transmission and storage, and the confidentiality, integrity, availability and non-repudiation of information all need to be realized by cryptographic technology. Modern high-performance computers can automatically analyze and intercept transmitted information, and can search hundreds of bottom codes per second, thus posing a serious threat to information security. The information field is eager to have more secure, convenient and effective means of information prot...

AI Technical Summary

Problems solved by technology

[0011] The primary purpose of the present invention is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide a dynamic encryption system based on the generalized information domain. The group structure enables the encryption and decryption parties to have a common activity background obtained through the transformation of the generalized information domain. From the encryption party to the decryption party, the key does not appear explicitly and does not involve the transmission of the key, so that the problem of key security can be extended to the generalized The transfer of security issues in the information domain; the system can obtain any activity background through physical and logical reconstruction of the generalized information domain. Existing research shows that the complexity of this transformation is an NP-hard problem; encryption rounds, packet length Dynamically variable, the scrambling diffusion algorithm is completely determined by the permutation characteristics of the key and the statistical characteristics of the segment

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