Attacking the combination generator
Frédéric Didier, Yann Laigle-Chapuy · arXiv (Cornell University) · 2009
We present one of the most efficient attacks against the combination generator. This attack is inherent to this system as its only assumption is that the filtering function has a good autocorrelation. This is usually the case if the system is designed to be resistant to other kinds of attacks. We use only classical tools, namely vectorial correlation, weight 4 multiples and Walsh transform.