International Association for Cryptologic Research

International Association
for Cryptologic Research

CryptoDB

Shengbao Wu

Publications

Year
Venue
Title
2015
EPRINT
2013
ASIACRYPT
2010
EPRINT
A Flaw in The Internal State Recovery Attack on ALPHA-MAC
An distinguisher was constructed by utilizing a 2-round collision differential path of ALPHA-MAC, with about $2^{65.5}$ chosen messages and $2^{65.5}$ queries. Then, this distinguisher was used to recover the internal state(\cite{Yuan1},\cite{Yuan2}). However, a flaw is found in the internal state recovery attack. The complexity of recovering the internal state is up to $2^{81}$ exhaustive search. And the complexity of the whole attack will be up to $2^{67}$ chosen messages and $2^{81}$ exhaustive search. To repair the flaw, a modified 2-round differential path of ALPHA-MAC is present and a new distinguisher based on this path is proposed. Finally, an attack with about $2^{65.5}$ chosen messages and $2^{65.5}$ queries is obtained under the new distinguisher.

Coauthors

Tao Huang (2)
Mingsheng Wang (3)
Hongjun Wu (2)
Wenling Wu (2)
Zheng Yuan (1)