International Association for Cryptologic Research (IACR)
Abstract
This paper presents differential fault analysis of the
MICKEY family of stream ciphers, one of the winners of eStream
project. The current attacks are of the best performance among
all the attacks against MICKEY ciphers reported till date. The
number of faults required with respect to state size is about
1.5 times the state size. We obtain linear equations to determine
state bits. The fault model required is reasonable. The fault model
is further relaxed without reproducing the faults and allowing
multiple bit faults. In this scenario, more faults are required
when reproduction is not allowed whereas, it has been shown
that the number of faults remains same for multiple bit faults
