Compactly Committing Authenticated Encryption Using Encryptment and Tweakable Block Cipher

ePrint Report: Compactly Committing Authenticated Encryption Using Encryptment and Tweakable Block Cipher

Shoichi Hirose, Kazuhiko Minematsu

Facebook introduced message franking to enable users to report abusive content verifiably in end-to-end encrypted messaging. Grubbs et al. formalized the underlying primitive called compactly committing authenticated encryption with associated data (ccAEAD) and presented schemes with provable security. Dodis et al. proposed a core building block called encryptment and presented a generic construction of ccAEAD with encryptment and standard AEAD. This paper first proposes …

block cipher encryption eprint report