How to Break a Semi-anonymous Fingerprinting Scheme
- Cite this paper as:
- Sadeghi AR. (2001) How to Break a Semi-anonymous Fingerprinting Scheme. In: Moskowitz I.S. (eds) Information Hiding. IH 2001. Lecture Notes in Computer Science, vol 2137. Springer, Berlin, Heidelberg
Fingerprinting schemes are techniques applied to protect the copyright on digital goods. They enable the merchants to identify the source of illegal redistribution. Anonymous fingerprinting schemes allow the buyers to purchase fingerprinted digital goods anonymously. However, on illegal redistribution the anonymity can be revoked.
In this paper we show serious shortcomings of two recent proposals on anonymous fingerprinting schemes. These schemes offer buyers only a weak form of anonymity and allow the merchants to cheat honest buyers. We clarify the notations of anonymity and fingerprinting and make several constructive proposals to repair some of the flaws.
KeywordsCopyright Protection Anonymity Fingerprinting Oblivious Transfer
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