Welcome to the resource topic for 2014/251
Title:
Forgery on Stateless CMCC
Authors: Guy Barwell
Abstract:We present attacks against CMCC that invalidate the claimed security of integrity protection and misuse resistance. We exploit the fact zero-padding is used on both the message and authenticated data and demonstrate how one may generate a forgery with a single call to the encryption oracle. From this we calculate the ciphertext of the chosen message, yielding a forgery and so breaking INT-CTXT. In the nonce-reuse setting, existence of a forgery leads directly to a 2-query distinguisher.
ePrint: https://eprint.iacr.org/2014/251
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