Anonymous Fingerprinting Scheme without Third Party
一种无第三方参与的匿名指纹方案

Digital fingerprinting plays an important role in digital copyright protection.It helps the merchants catch the real pirates after they get the illegal copies. In general, anonymous fingerprinting schemes are classified into three different classes called symmetric fingerprinting schemes, asymmetric fingerprinting schemes, and anonymous fingerprinting schemes. The real identity of buyers can be concealed only in anonymous fingerprinting schemes. Most of anonymous fingerprinting proposed need the trusted third party in order to issue certifications for buyers and reveal the real identify of pirate. Based on ElGamal-like algorithm, this paper presents an anonymous fingerprinting scheme without the trusted third party, moreover, this scheme has advantages of unlinkability and simple in process.The safety of this scheme is on the ground of the intractable problem of solving the discrete logarithm in finite field, therefore, this scheme is strong safety.