XOCB: Beyond-Birthday-Bound Secure Authenticated Encryption Mode with Rate-One Computation (Full Version)

ePrint Report: XOCB: Beyond-Birthday-Bound Secure Authenticated Encryption Mode with Rate-One Computation (Full Version)

Zhenzhen Bao, Seongha Hwang, Akiko Inoue, Byeonghak Lee, Jooyoung Lee, Kazuhiko Minematsu

We present a new block cipher mode of operation for authenticated encryption (AE), dubbed XOCB, that has the following features: (1) beyond-birthday-bound (BBB) security based on the standard pseudorandom assumption of the internal block cipher if the maximum block length is sufficiently smaller than the birthday bound, (2) rate-1 computation, and (3) supporting any block …

bbb beyond block cipher computation encryption eprint report features internal lee length mode rate report security standard version