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AES is a symmetric encryption algorithm widely used in many applications. An AES implementation in the data plane can help us build in-network security and privacy applications, such as IP header encryption or onion routing. However, it is not straightforward to implement AES on today's commodity programmable switches, which may not include a dedicated cryptography co-processor and support only simple arithmetic operation and table lookup. In this paper, we present the Scrambled Lookup Table technique for reducing the number of sequential arithmetic operations required for AES encryption, by utilizing the table matching capability available on programmable switches. We demonstrate an ecient implementation of AES on the Barefoot Tono programmable switch that encrypts 10.92Gbit, 8.76Gbit, and 7.37Gbit of data per second, for AES-128, -192, and -256 respectively, using less than 15% of the switch memory.

Author

Chen, Xiaoqi

Publisher

ACM

Published

2020

Language

EN