High-performance symmetric cryptography server with GPU Acceleration

With more and more sensitive and private data transferred on the Internet, various security protocols have been developed to secure end-to-end communication. However, in practical situations, applying these protocols would decline the overall performance of the whole system, of which frequently-used symmetric cryptographic operations on the server side is the bottleneck. In this contribution, we present a high-performance symmetric cryptography server. Firstly, a symmetric algorithm SM4 is carefully scheduled in GPUs, including instruction-level implementation and variable location improvement. Secondly, optimization methods is provided to speed up the inefficient data transfer between CPU and GPU. Finally, the overall server architecture is adopted for mass data encryption, which can deliver 15.96 Gbps data encryption through network, 1.23 times of the existing fastest symmetric cryptographic server. Furthermore, the server can be boosted by 2.02 times with the high-speed pre-calculation technique for long-term-key applications such as IPSec VPN gateways.