Study and Design on Fair Electronic Payment Schemes
|School||Xi'an University of Electronic Science and Technology|
|Course||Communication and Information System|
|Keywords||Fairness Electronic cash Electronic payment Trusted third party|
This paper studies the fairness of the electronic cash and electronic payment protocol fairness . Completely anonymous electronic cash can easily be copied and reused , so fair electronic cash is required at the necessary time to be able to revoke the anonymity . Protection for to prevent electronic cash reuse paper designs a secure off-line electronic cash , using the symmetric encryption algorithm to the user's identity information embedded in them , to efficiently track the identity of users or businesses repeated use of electronic cash ; the anonymity of legitimate users . Paper the second half of first describes the protocol of secure electronic payment , electronic check agreement and fair payment protocol requires a trusted third party , and explains the practical problems facing application without trust environment . Then introduced the signature without third-party fair exchange protocol , concurrent signature protocol . Finally , based on simultaneously with the entry into force of the signature technology ; respectively , each designed for digital goods and physical goods , a trusted third party fair electronic payment protocol , and demonstrate its fairness and security .