Method and device of real-time encryption for data communication network of wide area protection system

Abstract

The invention relates to a method and a device of real-time encryption for a data communication network of a wide area protection system. The device is characterized by comprising a transmitting communication device A and a receiving communication device B, wherein the transmitting communication device A has a real-time encryption function and a real-time encryption structure, while the receiving communication device B has a real-time decryption function and a real-time decryption structure; the transmitting communication device A is used for encrypting data transmitted by the physical link of a data network device, hiding the communication data messages of the wide area protection system and the information of a logic information and encrypting the transmitted data; a DES encryption algorithm is adopted for a gigabit communication port, and the length of the private key of the DES encryption algorithm is 64 bits, including 56 significant bits; the transmitting communication device A is used for converting an input time synchronization signal into a 56-bit private key in real time and then encrypting the communication link data; or radix-minus-one complement encryption is adopted for a ten-gigabit communication port by considering a large encryption calculation amount, in other words, 0 in raw data is altered into 1, while 1 in raw data is altered into 0. The method and the device of real-time encryption for the data communication network of the wide area protection system have the beneficial effect that the encryption is difficult for the outside to break through by virtue of traversal try, or messages cannot be read out by the outside.

Description

technical field [0001] The invention relates to a method and device for real-time encryption of a data communication network of a wide area protection system. It belongs to the technical field of power communication. Background technique [0002] The wide-area protection system refers to a number of closely related substations as an area, and the protection devices in the area are interconnected through optical fibers, and through information sharing, according to the network topology, the fault point can be quickly located to protect and control the regional power grid. [0003] Wide-area protection control is defined as relying on the information of multiple points in the power system to quickly, reliably and accurately remove faults, and at the same time analyze the impact of fault removal on the safe and stable operation of the system, and take corresponding control measures to improve the available capacity of transmission lines. Or system reliability, a system that re...

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Problems solved by technology

[0008] One of the purposes of the present invention is to provide a real-time encryption method for the data communication network of the wide-area protection system in order to solve the problem of insecure fixed keys and the management and distribution of dynamic keys in the prior art

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