Security of a multisignature scheme for specified group of verifiers
نویسندگان
چکیده
A multisignature scheme for specified group of verifiers needs a group of signers cooperation to sign a message to a specified group of verifiers that must cooperate to check the signature s validity later. Recently, Zhang et al. proposed a new multisignature scheme for specified group of verifiers. However, we find that Zhang et al. s scheme cannot prevent a dishonest clerk of signing group from changing the signing message to another message of his choice while he is cooperating with the signers to produce a multisignature. Therefore, their scheme is insecure. 2004 Elsevier Inc. All rights reserved.
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عنوان ژورنال:
- Applied Mathematics and Computation
دوره 166 شماره
صفحات -
تاریخ انتشار 2005