github.com/ericlagergren/ocb3 (go): Package ocb3 implements the Offset codebook mode (OCB3) cipher block mode.  This implementation runs at around 25 cycles per byte for messages between 1 KiB and 8 KiB, measured on a 2021 MacBook Air M1.  This package is implemented per RFC 7253 and "The Design and Evolution of OCB" by Krovetz and Rogaway in the Journal of Cryptology (volume 34, issue 4)0.  OCB3's patents were abandoned in February 2021.
Keywords: cryptography|ocb|ocb3