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Fingerprinting Protocol Based on Distributed Providers Using Oblivious Transfer Urara SHINMYO Minoru KURIBAYASHI Masakatu MORII Hatsukazu TANAKA Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Vol.E89-A No.10 pp.2597-2602 Publication Date: 2006/10/01 Online ISSN: 1745-1337 DOI: 10.1093/ietfec/e89-a.10.2597 Print ISSN: 0916-8508 Type of Manuscript: Special Section PAPER (Special Section on Information Theory and Its Applications) Category: Cryptography Keyword: fingerprinting, distributed providers, oblivious transfer, Full Text: PDF(304.2KB)>>
Summary: For the construction of a large fingerprinting system, conventional protocols need many computations to provide each fingerprinted contents to each user. In order to reduce the computational cost, we introduce a new concept of distributed providers in the fingerprinting protocol. Before a sale, our practical fingerprinting protocol using a concept of secure oblivious transfer is performed between a contents supplier and each provider. Then each provider obtains fingerprinted contents such that each bit of fingerprinting information is embedded in each segment of the contents. When a user orders some contents to the supplier, each segment of the contents is distributed from each provider specified by the supplier. The selection of providers who distribute the segments of contents is executed based on the user's identity so that the sequence of embedded bits in the collected segments may indicate the user's identity. | ||||||||||
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