Trade-off traitor tracing

Authors:
Kazuto Ogawa;Go Ohtake;Goichiro Hanaoka;Hideki Imai
Affiliations:
Japan Broadcasting Corporation, Japan;Japan Broadcasting Corporation, Japan;National Institute of Advanced Industrial Science and Technology, Japan;National Institute of Advanced Industrial Science and Technology, Japan
Venue:
INDOCRYPT'07 Proceedings of the cryptology 8th international conference on Progress in cryptology
Year:
2007

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Abstract

There has been a wide ranging discussion on the contents copyright protection in digital contents distribution systems. Fiat and Tassa proposed the framework of dynamic traitor tracing. Their framework requires dynamic computation transactions according to the realtime responses of the pirate, and it presumes real-time observation of contents redistribution and therefore cannot be simply utilized in an application where such an assumption is not valid. In this paper, we propose a new scheme that not only provides the advantages of dynamic traitor tracing schemes but also overcomes their problems.