Abstract:

By analysing the electronic commerce protocol based on credit, the paper proposes an optimistic fair e-commerce protocol with electronic wallets. By a  pplying the Cross Validation for encryption algorithms, the atomicity of the electronic commerce protocol can be really achieved. Towards the e-commerce protocol based on an improved DSA signature algorithm, the paper analyzes the condition of the customers＇ vicious overdraft. The introduction of elect  tronic wallet as the security control terminal effectively avoids the customers＇ vicious overdraft. The whole process of the protocol is elaborated. Th he atomicity and security of the protocol is validated informally.

Key words: （e-commerce protocol, atomicity, cross validation, electronic wallet）