A Java Implementation of a Multisignature Scheme

摘要

Multisignature protocols are digital signature schemes that allow a group of users to sign a message so that the signature thus produced is valid only if all the members of the group participate in the signature process. In general, these schemes need the collaboration of a Trusted Third Party, which computes and securely stores some of the parameters associated to the scheme. In this work, we present our results and conclusions after implementing as a Java application a multisignature scheme based on the Integer Factorization Problem and the Subgroup Discrete Logarithm Problem.