Trade Protocol of Products Based on Digital Signature and Fingerprinting

摘要

Combining digital watermarking and fingerprinting with digital signatures, a relatively perfect transaction protocol of a small amount of information embedded in digital products was proposed, so as to reduce issues of descending quality, as well as issues of mutual interference because of the excessive fingerprint or watermark information. Before the trade, a robust symmetric watermarking was embedded in a product sample and it is signed in digital, thus online buyer verified legitimate copyright and found timely pirated products. During the trade, after an asymmetric digital fingerprinting was embedded in the digital product, the seller could trace pirate by the trade fingerprint, and at the same time, could also prevent merchant from bring a false charge against customers. Analysis shows that the trade protocol has an anonymous property for buyer, and protects the legitimate rights both buyers and sellers.