A Key Dispersion Method for Enhancing the Security of Symmetric Key System

Abstract

The invention discloses a key dispersion method for enhancing the security of a symmetric key system, and relates to the technical field of information security encryption, comprising the following steps: step (1), respectively injecting a secondary dispersion factor into a primary key management system; In step (2), the first-level key management system uses the national standard algorithm to perform distributed operations on the second-level dispersion factor with the designated key, and obtains the key data of the second-level key management system. The beneficial effect of the present invention is that: adopting the present invention, different dispersive factors can be distributed and calculated by specifying a key to obtain several pieces of different key data. This method avoids the single derivation and transformation method in which the random number is directly used as a key, provides multiple key derivation transformation methods, and enhances the security of the key derivation transformation process.

Description

technical field [0001] The invention relates to the technical field of information security encryption, in particular to a key distribution method for enhancing the security of a symmetric key system. Background technique [0002] Cryptography technology is the basic technology of information security, and the key is the basis of secure application of cryptography technology and the core element of information security. With the rapid and comprehensive development of my country's information industry, the key management system based on the symmetric key system has also entered a comprehensive construction stage, and the key derivation process in the symmetric key system is facing more and more stringent technical requirements. [0003] The keys used in the current traditional symmetric key system mainly use cryptographic equipment to generate several pieces of key data, and use the several pieces of key data as the key data used in the system. In the above process, the key ...

AI Technical Summary

Problems solved by technology

The key dispersion technology is relatively complex and cumbersome, and the security of the decentralized derivation algorithm implemented by itself cannot be guaranteed; the number of dispersion factors participating in the dispersion process is large, which is not conducive to the operability of key dispersion

In addition, through the above-mentioned key dispersion technology, different keys may be derived from the same key and dispersion factor, or the same key may be derived from different keys and dispersion factors, so there is a greater security risk

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