Building a consumer anonymity scalable payment protocol for [the] Internet purchases
Hua Wang, Jinli Cao, Yahiko Kambayahsi · 2002
This paper proposes a secure, anonymity scalable and practical payment protocol for the Internet purchases. It uses electronic cash for payment transactions. In this new protocol, users can improve the anonymity for themselves if they worry about disclosure of their identities. We delegate an agent toprovide the higher anonymous certi cate and improve thesecurity. The agent willcertify re-encrypted data after verifying the validity ofthe content from users, but without any private information of the users. With this new method, each user can get the required anonymity level, depending on the available time, computation and the cost. Furthermore, the new payment protocol can prevent fromeavesdropping, tampering and impersonation e ectively. We also analyse how to prevent a user from spending a coin more than once and discuss how to use the proposed protocol for the Internet purchases. The new method provides an e cient and untraceable electronic cash scheme. It is promising for electronic trades through the Internet. Keywords: Electronic-cash, Anonymity, Traceability, Hash function. 1