[Resource Topic] 2016/697: Ciphertext Forgery on HANUMAN

Welcome to the resource topic for 2016/697

Title:
Ciphertext Forgery on HANUMAN

Authors: Damian Vizár

Abstract:

HANUMAN is a mode of operation of a keyless cryptographic permutation for nonce-based authenticated encryption with associated data, included among the modes bundled in the PRIMATEs candidate in the currently ongoing CAESAR competition. HANUMAN is a sponge-like mode whose design and security argument are inspired by the SpongeWrap construction. We identify a flaw in the domain separation of HANUMAN, and show how to exploit it to efficiently produce ciphertext forgeries.

ePrint: https://eprint.iacr.org/2016/697

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