2 research outputs found
Fast irreducibility and subgroup membership testing in XTR
We describe a new general method to perform part of the setup stage of the XTR system introduced at Crypto 2000, namely finding the trace of a generator of the XTR group. Our method is substantially faster than the general method presented at Asiacrypt 2000. As a side result, we obtain an efficient method to test subgroup membership when using XTR