Anonymous fingerprinting scheme based on the bilinear pairings diffie-hellman problem

The invention bilinear pair difficile on the appropriate network to protect the intellectual property rights of digital information without leaking the identity information of the purchaser relates to Hellman problem anonymous fingerprinting (Fingerprinting) method using a (Bilinear Diffie-Hellman Problem). Existing anonymous fingerprinting technique based on zero-knowledge proof or group signature is impractical because the issue was raised and the operation process is complicated and the size of the participating entity key is too long. In the present invention, by using a bilinear pair is to design a secure anonymous fingerprinting techniques eumyeonseodo and enable efficient operation in consideration of the case of low computing power of each of the objects, especially the key size is smaller.