An encrypted communication method of power system debugging tool based on shared key

Abstract

The invention discloses a method for encrypting communication of a power system debugging tool based on a shared secret key. Under the existing shared-key mechanism, all communication environments usethe same key pair, and there is a risk that the malicious attacker can reverse-analyze the key by acquiring a large number of communication samples. The invention presets a shared initialization keyKInt and a shared key group KG, and agrees on the same encryption and corresponding decryption algorithm. In the communication process, the initiator and the receiver use the initialization key KInt to realize the mechanism that the communication key KT is specified by the receiver by checking the random number, and the mechanism that the initiator and the receiver agree to confirm the communication key together, so as to realize the method that the two sides use different shared key for each communication, and to improve the security of the encrypted communication.

Description

technical field [0001] The invention belongs to the field of power system communication, in particular to an encrypted communication method for a power system debugging tool based on a shared key. Background technique [0002] In the communication protocol of the secondary equipment debugging tool in the power system, private plaintext transmission is often used. Although this method facilitates the diagnosis of abnormal information during the use of the tool, it also brings the risk of internal information leakage of the secondary equipment, and there are potential safety hazards. . [0003] In encrypted communication of power system debugging tools, encrypted communication based on shared key is a common communication method. In this method, both parties to the communication are based on the agreed encryption algorithm and share a preset symmetric key to realize encrypted communication. This method is simple to use and has high encryption efficiency, but the same key is ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem of using the same key pair for communication in all communication environments under the existing shared key mechanism, and there is a risk of being reversely analyzed and cracked by a malicious attacker by obtaining a large number of communication samples, and providing An encrypted communication method for a power system debugging tool based on a shared key, which implements communication using a different shared key each time based on a shared key group, so as to improve communication security and be simple and reliable to use

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