Cryptanalysis of a matrix-based MOR system
نویسنده
چکیده
We cryptanalyze a recently proposed matrix-based MOR cryptosystem. The security of the system depends on the difficulty of solving the following discrete logarithm problem: given an inner automorphism φ of SL(d,Fq) and φa (each given in terms of their images on generators of SL(d,Fq)), find a. We show that this problem can be reduced to a small number of similar problems in quotients of polynomial rings and solved in subexponential-time.
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تاریخ انتشار 2014