Signature scheme of forward and backward security group based on verifiable random number
Yining Liu · Journal of Lanzhou University of Technology · 2011
By means of the interpolation polynomial on finite field,a construction method of a class of verifiable random number was given and the verifiable random number was applied to group signature scheme,so that an applied scheme of verifiable random function in group signature system was proposed.Then the security of the scheme was analyzed and the scheme was compared with other ones.The result showed that the scheme was anonymous,traceable,unforgeable and so on.Member adding and removing could be expediently realized and the forward and backward security could be easily realized,also.And private keys of the members were unnecessary to be reset in different signature stages.Compared with other schemes,the scheme proposed exhibited certain superiority.