Binary Information Press
Protocols for fair exchanges can be used to realize the fair exchanges in e-commerce. However, most of the fair exchange protocols ignore the protection for sensitive information such as the contents of important business contracts and the corresponding signed documents. Then, based on Xin's basic signature, using the Diffie-Hellman key exchange principle and technique of symmetric encryption, a fair exchange protocol with information protection is proposed. The authors' protocol allows two parties to exchange digital items such as the sensitive or secret business contracts in a fair and secure way.