Block attacks on Gollmann cascades
Shun‐Lung Su, Yun‐Feng Tsai, Lih‐Chyau Wuu · Journal of the Chinese Institute of Engineers · 2007
In research to date, attacks for Gollmann Cascades (Chambers and Gollmann, 1988; Menicocci, 1993; Menicocci, 1995a; Menicocci, 1995b; Meier and Staffelbach, 1992; Lee et al., 1995; Menicocci and Golic, 1999) have had to obtain information such as length of LFSR (Linear Feedback Shift Register), and primitive polynomials in order to compromise all initial states of LFSRs. The approach of this research is to find all primitive polynomials and initial states with minimum information of the length of LFSR, and the number of stages being given. Under the condition that the key stream is sufficiently long, block attacks can also be used on longer length LFSRs or longer cascades as well.