Anti‐leakage transmission method of high privacy information in electric power communication network based on digital watermarking technology

A method of transmission of highly confidential information in power communication network based on digital watermarking technology is proposed in order to reduce the leakage risk of power information and achieve the purpose of safe transmission of private information. This method establishes the data topology model of power communication network and connects the data receiving and sending terminals. Digital watermarking technology is used to embed digital watermarking in the information to be transmitted, encrypt the private information, and optimize the DES encryption algorithm to encrypt the information twice, so as to realize the safe transmission of information. The experimental results show that the digital watermark embedding rate, DES encryption rate, DES decryption rate and watermark extraction rate of the proposed method are all above 90 Mbps, and the file transfer time of 3965Byte is less than 5s, leakage risk rate and packet loss rate are 0.0001% and 0.006%, respectively, which effectively protects the security of high privacy information in the power communication network and prevents information leakage. Figure 9 shows the information scrambling effect obtained by owner A of high privacy information of power communication network in the smart grid, who applies the method in this paper to transmit information to the customer with the number QWE524RT01, where the numbers CG1, CG2, CG3, CG4, CG5, CG6, CG7 and CG8 correspond to the eight high privacy information files of power communication network respectively.