A flexible payment scheme and its permission-role assignments are proposed in this paper. The scheme uses electronic cash for payment transactions In this protocol, from the viewpoint of banks, consumers can improve anonymity if they are worried about disclosure of their identities. A role called anonymity provider agent (AP) provides a high level of anonymity for consumers. The role AP certifies re-encrypted data after verifying the validity of the content from consumers, but with no private information of the consumers required. With this method, each consumer can get a required anonymity level, depending on the available time, computation and cost.
There are two types of problems that may arise in permission-role assignments. One is related to authorization granting process. Conflicting permissions may be granted to a role, and as a result, users will the role may have or derive a high level of authority. Another is related to authorization revocation. When permission is revoked from a role, the role may still have the permission from other roles. To solve these problems, we first analyse the duty separation constraints of the role hierarchies in the scheme, then discuss granting a permission to a role, weak revocation permissions and strong revocation permissions for the scheme.
|Cite as: Wang, H., Cao, J. and Zhang, Y. (2003). A Flexible Payment Scheme and its Permission-Role Assignment. In Proc. Twenty-Sixth Australasian Computer Science Conference (ACSC2003), Adelaide, Australia. CRPIT, 16. Oudshoorn, M. J., Ed. ACS. 189-198. |