Abstract:

By analyzing the iKP protocol and pointing out its drawbacks, an improved secure electronic payment protocol was presented, which preserved the security properties of the iKP protocol. The new protocol had the following benefits: cutting down the communication payload in the transaction, avoiding the redundant verification of signatures, supporting identification and evidence collection during delivery phase of the goods，providing the perfect protection of the purchase privacy, and guaranteeing that the consumers have had the possession of the goods before bank clearing starts.

Key words: electronic commerce, secure electronic payment protocol, purchase privacy protection