摘要：E-payment scheme allows two users to securely exchange e-cash and digital product over an open network. A problem in the across administrative domains E-payment scenarios is how the participants can carry out the exchange between administrative domains. In other words, the parti-cipants are administrated by two trusted administrators respectively. How can they verify their identities each other? In this paper, a certificateless cross-domain authenticated key exchange (CL-CD-AKE) scheme was proposed to solve this problem, and the security and the effectiveness of the proposed CL-CD-AKE scheme were analyzed in the extended random oracle model. Following this work, an E-payment scheme, achieving unforgeability and unreusability of e-cash, customer anonymity and fairness, was then proposed, and the CL-CD-AKE scheme was adopted by the E-payment scheme to deal with the problem of cross-domain authentication and key agreement.
