A PROVABLY SECURE AND FORWARD SECURE GROUP SIGNATURE SCHEME
Group signature scheme plays an important role in the management of public resources,the issuance of important information,and electronic cash systems.However,group signature scheme is inefficient,and it cannot guarantee the anonymity of information.To address the problem,an efficient and forward-secure blind group signature scheme based on the Chinese remainder theorem is proposed.The scheme simplified the signing process and blinds information.Its security was proved under the random oracle model.The scheme could dynamically add or delete group members without frequently changing the key information of the remaining group members.And the scheme only needed to change the group public information through calculation.Meanwhile,the private keys of group members were updated over time,so that the scheme had forward security.The efficiency of the scheme was analyzed.The scheme had a small system overhead and a short signature length.And the scheme was more suitable for open and low-bandwidth communication environments.
Group signatureBlind signatureShort signatureForward securityProvably secureDynamics
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