Ring-based anonymous fingerprinting scheme

Authors:
Qiang Lei;Zhengtao Jiang;Yumin Wang
Affiliations:
Key Laboratory on Computer Networks Information Security of Ministry Education, Xidian University, Xi’an, China;Key Laboratory on Computer Networks Information Security of Ministry Education, Xidian University, Xi’an, China;Key Laboratory on Computer Networks Information Security of Ministry Education, Xidian University, Xi’an, China
Venue:
CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part II
Year:
2005

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Abstract

Fingerprinting schemes are important techniques for protection of intellectual property. However, the previous schemes have some trust assumption made on the registration center, meanwhile they always consider the collusion between the registration and the merchant, also the buyer. To overcome those disadvantages, an anonymous fingerprinting scheme using a modification of Schnorr ring signature is presented. When a buyer wants to buy digital goods, he can sign the text m that describes the deal on behalf of the ring, which can bring fully anonymity and unlinkability. Once redistributing fingerprinted copies, a merchant still could trace the buyer with a slightly different version.