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Encryption method and system based on AES and HMAC-SHA in power distribution terminal DNP protocol

A technology of power distribution terminal and encryption method, which is applied in the field of encryption method and system based on AES and HMAC-SHA, and can solve the problems of low security of data packets and the like

Pending Publication Date: 2020-10-30
INTEGRATED ELECTRONICS SYST LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an encryption method and system based on AES and HMAC-SHA in the DNP protocol of a power distribution terminal, aiming at solving the problem of low security of data messages in transmission in the prior art, and realizing that the session key does not use It is displayed to users and attackers in plain text to improve the security of data communication

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  • Encryption method and system based on AES and HMAC-SHA in power distribution terminal DNP protocol
  • Encryption method and system based on AES and HMAC-SHA in power distribution terminal DNP protocol
  • Encryption method and system based on AES and HMAC-SHA in power distribution terminal DNP protocol

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Embodiment Construction

[0024] In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily lim...

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Abstract

The invention provides an encryption method and system based on AES and HMAC-SHA in a power distribution terminal DNP protocol. According to the invention, the AES algorithm is introduced to encrypt the secret key; the secret key is not displayed to a user and an attacker in a plaintext form; an attacker is prevented from stealing the AES algorithm key; an HMAC-SHA algorithm is introduced for encryption signature verification, the strictest HMAC-SHA-256 method is adopted, communication process security is further improved, in addition, in the communication process, the session key use frequency, the effective time interval limitation and the session key effectiveness judgment are increased, and the session key is periodically and effectively updated, so that a set of effective safety mechanism scheme is formulated for improving the protection level of the distribution automation terminal, and the safety of communication data can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of power distribution terminal data encryption, in particular to an encryption method and system based on AES and HMAC-SHA in the power distribution terminal DNP protocol. Background technique [0002] DNP3.0 protocol (Distributed Network Protocol, a communication protocol formulated on the basis of TC57 protocol) is a distributed protocol, which is suitable for data communication fields requiring high security, medium speed, and medium throughput. In the field of distribution network terminals, The DNP3.0 communication protocol is widely used in data communication, but in the network application environment and the actual power system use process, because the data format is open, the data message of the DNP3.0 protocol is easy to be stolen during the transmission process. Illegal intruders intercept and monitor, and then modify the message to achieve the purpose of attacking the terminal, which greatly redu...

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Application Information

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IPC IPC(8): H04L9/06H04L9/32H04L29/08G16Y10/35G16Y30/10
CPCH04L9/0631H04L9/0643H04L9/3247H04L9/3242H04L67/12G16Y10/35G16Y30/10
Inventor 张汉伟阴法强常栋梁李连强
Owner INTEGRATED ELECTRONICS SYST LAB