Timestamp technique-based industrial network security transmission method

Abstract

The invention relates to a timestamp technique-based industrial network security transmission method and belongs to the technical field of security transmission. The method comprises the steps of encrypting at a transmitting end and decrypting at a receiving end. During the encrypting process, the local time is extracted to generate a time character string, and then to-be-sent data or instructions are added into the time character string. After that, the time character string is encrypted according to an encryption algorithm to generate a ciphertext, and the ciphertext is encrypted for a second time through introducing a user key to generate a final ciphertext. Finally, the time character string and the final ciphertext are transmitted together. During the decrypting process, the received ciphertext and a received timestamp are verified to be whether outmoded / forged or not. On the condition that the ciphertext and the timestamp are verified to be outmoded / forged, the ciphertext and the timestamp are discarded. Otherwise, all possible instructions / data are matched in the same encryption mode with the transmitting end. If the matching result is successful, the decryption is successful. If the matching is not successful, the operation is continued till no data or instruction is matched successfully. After that, the data / instructions are discarded. According to the technical scheme of the invention, the deceit through maliciously counterfeiting data can be prevented, so that real data obtained through sniffing cannot be reused. Moreover, the method is simple, practical, efficient, and low in requirement on hardware.

Description

Technical field: [0001] The invention relates to industrial data security transmission technology, in particular to a time stamp technology-based industrial data network security transmission method, which belongs to the field of security transmission technology. Background technique [0002] The secure transmission of data and instructions has always been a matter of concern. If the data is transmitted in plain text during transmission, it is easy to be used maliciously after being intercepted; while the encrypted transmission is sniffed, it is easy for hackers to reuse the data to achieve forgery The purpose of sending; the use of security protocols or complex encryption methods is often too costly or inefficient. Therefore, the safe transmission of data has always been a difficult problem that people are trying to solve, especially for the small amount of data in the field of industrial control and the correct identification and implementation of control instructions is o...

AI Technical Summary

Problems solved by technology

[0002] The secure transmission of data and instructions has always been a concern. If the data is transmitted in plain text during the transmission process, it is easy to be used maliciously after being intercepted; if the encrypted transmission is sniffed, it is easy for hackers to reuse the data to achieve forgery. The purpose of sending; the use of security protocols or complex encryption methods is often too costly or inefficient

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