Anonymous and Transferable Electronic Ticketing Scheme

Electronic tickets demonstrate, without the use of paper, the possession of an authorization or access to a determined service. In this scenario, some security requirements must be accomplished. Moreover, some determined services should guarantee the anonymity of the users in the system. In addition to these requirements, the transferability of a ticket from one user to another (without involving a third party) is useful but also generates other issues to be solved in terms of security, as several attacks could be performed. In this article we present an electronic ticketing system with anonymity and transferability based on the use of group signatures, giving a solution to enable linkability between several group signatures, and also proving their ownership with the use of ZeroKnowledge Proofs (ZKPs).