An Encrypted Communication Method Based on Random Selection of Shared Key
A technology of encrypted communication and random selection, which is applied in the field of encrypted communication based on random selection of shared keys to achieve high encryption efficiency and simple use
Active Publication Date: 2021-05-28
NR ELECTRIC CO LTD +1
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Problems solved by technology
[0005] The purpose of the embodiment of the present invention is to provide an encrypted communication method based on random selection of a shared key. By randomly selecting a group from the shared key group as a communication key, it overcomes the common shared key method that is used in communication. The problem caused by the same key, through the random selection of the key, the privacy and security of communication are improved
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[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the specific implementation manners of the technical solutions of the present invention will be described in more detail and clearly below in conjunction with the drawings and embodiments. However, the specific embodiments and examples described below are for the purpose of illustration only, rather than limiting the present invention. It only contains a part of the embodiments of the present invention, but not all of them. Other embodiments obtained by those skilled in the art through various changes of the present invention all belong to the protection scope of the present invention.
[0038] The two parties in the communication, including the initiator and the receiver, share a key group K containing N groups of keys G , where N≥2; key K i is K G The i(1≤i≤N) group key; the communication parties agree on the same encryption algorithm E(K i , x),...
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The invention provides an encryption communication method based on random selection of a shared key. The method includes: the initiator sends a link request message to the receiver; receives a request response message from the receiver; the request response message is constructed by the receiver based on a communication key, and the communication The key is a group of keys randomly selected by the receiver from the shared key group; decrypting the request response message; verifying the request response message; verifying the communication key based on the request response message Negotiation consensus; perform encrypted communication with the receiver using the communication key. The present invention realizes the method of randomly selecting the initial key and negotiating the communication key by agreeing on the shared key group under the negotiation verification mechanism based on random numbers, realizes the use of different symmetric keys for each communication, and encrypts The communication method in which the key is randomly designated by the communication receiver has the characteristics of free configuration, simple use, and high encryption efficiency.
Description
technical field [0001] The invention relates to the field of encrypted communication, in particular to an encrypted communication method based on random selection of a shared key. Background technique [0002] Among the communication protocols used by power system tools, standard or private clear text protocol communication is often used. Clear text communication, especially based on communication standards, facilitates the analysis and positioning of abnormal communication problems during the use of tools, but clear text communication also brings the risk of information leakage, and there are certain hidden dangers in information security. [0003] In power system tool communication, the more common encrypted communication is the encrypted communication method based on shared symmetric key. In this method, both communication parties agree in advance on a communication encryption algorithm and a symmetric key to realize encrypted communication. The method of sharing a symm...
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IPC IPC(8): H04L29/06H04L9/08
CPCH04L9/0816H04L9/0838H04L63/06
Inventor 李广华顾浩周强陈宏君王自成陶士全文继锋
Owner NR ELECTRIC CO LTD