Abstract
In CT-RSA 2011, Maji et.al proposed an attribute-based signature (ABS) scheme, which is the most efficient ABS scheme that supports general predicates until now. They claimed that their ABS scheme is unforgeable under generic group model. Unfortunately, we found a forgery attack on this ABS scheme. In this paper, we firstly give a forgery example, then analyze the reason cause this attack and gives the conditions this attack worked. We found this attack is fatal to Maji et.al’s ABS scheme.
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