Abstract. We formally study two privacy-type properties in online auction protocols, bidding-price-secrecy and receipt-freeness. These properties are formalised as observational eq...
We present a new commerce protocol that allows customers and merchants to conduct face-to-face creditcard authorizations with a credit card company securely with the option of ano...
Model checkers such as FDR have been extremely e ective in checking for, and nding, attacks on cryptographic protocols { see, for example 11, 12, 14] and many of the papers in 3]....