An examination of the security of the TR-31 and AS 2805 schemes

Abstract

In our review of payments cryptography, we analyze the security of the Australian card payment system. In the analysis, we examine existing cryptographic protocols using well-known techniques. We discuss the Australian Triple-DES variant methods (AS 2805) which offer key usage division. We then compare Triple-DES variants with alternative mechanisms to discover a significant weakness in the AS 2805 methods.