Improved SM4 parallel encryption and decryption communication method based on GPU

Abstract

The invention discloses an improved SM4 parallel encryption and decryption communication method based on a GPU (Graphics Processing Unit). The encryption and decryption method comprises the following steps: using an AES (Advanced Encryption Standard)-128 key expansion algorithm to generate an expanded subkey needed by an SM4 encryption algorithm; improving a round function in the SM4 encryption algorithm; and using the parallel computing power of the GPU, improving the SM4 encryption algorithm into a form of parallel encryption. By adopting the encryption and decryption communication method of the invention, the security and the speed of implementation can be effectively improved, real-time and parallel encryption can be performed on data, and the encryption speed can be improved, so that normal transmission of data flow can be guaranteed and the processing delay can be reduced.

Description

technical field

[0001] The invention relates to the technical field of information security, in particular to a GPU-based improved SM4 parallel encryption and decryption communication method. Background technique

[0002] With the development of the Internet of Things, more and more enterprises need to connect production and operation equipment to the network and conduct remote real-time monitoring on them. A large amount of equipment monitoring data often needs to be transmitted to remote monitoring centers through the Internet. However, due to the openness of the Internet, once the monitoring data is intercepted and used to carry out sabotage activities, the losses it brings will be very serious. Therefore, it is very important to encrypt the transmitted monitoring information and at the same time ensure the real-time performance of the monitoring data transmission.

[0003] SM4 (formerly SMS4) is a block cipher algorithm announced by the State Cryptography Administration...

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