Differential Attack on Message Authentication Codes (1994)
| Citations: | 4 - 0 self |
BibTeX
@MISC{Ohta94differentialattack,
author = {Kazuo Ohta and Mitsuru Matsui},
title = {Differential Attack on Message Authentication Codes},
year = {1994}
}
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Abstract
We discuss the security of Message Authentication Code (MAC) schemes from the viewpoint of differential attack, and propose an attack that is effective against DES-MAC and FEAL-MAC. The attack derives the secret authentication key in the chosen plaintext scenario. For example, DES(8-round)-MAC can be broken with 2 34 pairs of plain text, while FEAL8-MAC can be broken with 2 22 pairs. The proposed attack is applicable to any MAC scheme, even if the 32-bits are randomly selected from among the 64-bits of ciphertext generated by a cryptosystem vulnerable to differential attack in the chosen plaintext scenario.
