Abstract: A new application to group signature on 1-out-of-n oblivious transfer is proposed. After introducing, the transformation of 1-out-of-n oblivious transfer protocol proposed by Ref.1, a new membership revocation method in group signature is proposed by use of the transformation protocol. The proposed method is a universal method and can be applied to any group signature scheme; however, the previous revocation methods are only applicable to a specific group signature scheme. Under the random oracle model and computational Diffie-Hellman (CDH) assumption, the proposed protocol is provably secure.