Steganography-based key transmission and key updating method

Abstract

The invention provides a steganography-based key transmission and key updating method, which is applied to the field of information safety. The method comprises the steps that a communication party A sets a communication type, an encryption algorithm an steganography algorithm, selects a steganography carrier and generates a communication identifier and then performs the updating of a transmission key or the transmission process of a conversion key; a new transmission key is selected when in updating, a time stamp and a signature are generated to encrypt and steganograph the transmission key, the key updating information is generated to be transmitted to a communication party B, and the communication party B performs the verification, de-staganography and deciphering to obtain the transmission key; and the conversion key is selected in transmission to generate a time stamp and a signature so as to encrypt and steganograph the conversion key, the key transmission information is generated to be transmitted to the communication party B, and the communication party B performs the verification, de-steganography and deciphering to obtain the conversation key. The key is concealed by utilizing the steganography, so that an encrypted data format in the key transmission process and the key updating process can be effectively protected, and the safety transmission of multiple encryption and decryption algorithm conversation keys can be realized.

Description

technical field [0001] The present invention relates to key management technology and steganography, and belongs to the field of information security. Specifically, a steganography-based key transmission and key update method is proposed, and steganography is used for key transmission and key update. in the key management process. Background technique [0002] As a resource, information is of special significance to human beings due to its universality, sharing, value-added, processability and multi-utility. With the rapid development of science and technology, the number of Internet users is increasing day by day, and the transmission information is more and more sensitive at the same time. The possibility of threat, interference and destruction of information resources will be greatly increased; in addition to network security issues, personal computer data storage, The healthy development of e-government systems (involving state secrets) and e-commerce construction of va...

AI Technical Summary

Problems solved by technology

[0008] (1) Authentication problem: the symmetric cryptosystem cannot realize the signature, and cannot prevent the sender of the message from denying the message;

However, it is required that the central server must be online at any time, which means that the central server is the key to the success of the entire communication and the focus of attacks, and will also become the "bottleneck" of communication services in a huge organization

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