Method and system for encrypting and decrypting data of real-time data acquisition system

Abstract

The invention provides a method and a system for encrypting and decrypting data of a real-time data acquisition system. The method divides the data of the real-time data acquisition system into 64-bitblocks by using the DES algorithm, and encrypts each 64-bit data block using a 64-bit key overlapped by 16-bit keys, but only re-encrypts a 16-bit key for package and transmission with the encrypteddata when the data is packaged and transmitted, which greatly improves the speed of the encryption operation, and not only satisfies data real-time requirements of the data real-time acquisition system, but also meets the requirements for speed, power consumption and stability of the processor, and effectively saves system memory and processing time. The invention is simple and may be applied to most ARM hardware platforms and all DSP hardware by improving the standard encryption algorithm. The method and system are not only used for data encryption protection based on real-time acquisition ofwireless Internet of Things, but also available for other data encryption protection situations with real-time requirements.

Description

technical field [0001] The present invention relates to the fields of data collection and information security, and more specifically, to a method and system for encrypting and decrypting data in a real-time data collection system. Background technique [0002] Data collection at industrial sites has always been based on fieldbus technology, and the Internet of Things technology cannot be applied based on safety considerations. At present, there are many encryption algorithms, but the algorithms that can be used for data encryption, such as ECC, RC, AES, IDEA, DES, 3DES, RSA, SHA, etc., cannot meet the requirements of real-time collection and encryption due to the limitation of the operation speed of embedded processors. requirements. [0003] Therefore, there is a need for a method and system for rapidly encrypting and decrypting collected data during the process of collecting data in real time. Contents of the invention [0004] In order to solve the technical problems...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems existing in the prior art that cannot meet the requirements of real-time data collection at industrial sites and fast encryption and decryption thereof, the present invention provides a method for encrypting data in a real-time data collection system, the method comprising:

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