2013 Fiscal Year Final Research Report
Construction and Performance Analysis of Digital Fingerprinting Code with Identifiability of All Malicious Users
| Project/Area Number |
23500004
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fundamental theory of informatics
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| Research Institution | University of Tsukuba |
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Principal Investigator |
KOGA Hiroki 筑波大学, システム情報系, 准教授 (20272388)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 電子指紋符号 / コンテンツ保護 / 電子透かし / 不正者特定 / 符号化定理 / 結託耐性符号 |
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| Research Abstract |
Digital fingerprinting codes are embedded in licensed digital contents for preventing illegal distribution by malicious users. Digital fingerprinting codes are usually required to have the ability to specify a part (or all) of a collusion of malicious users who generate the pirated copy.
In this study we consider an information-theoretic model of the digital fingerprinting code and characterize the maximum rate of the users (the capacity of the digital fingerprinting code) such that all the malicious users in a collusion can be specified with probality close to one under a certain assumption. We also discuss the zero-error capacity of the digital fingerprinting code for the case where all the malicious users in a collusion are specified without error under certain attack models.
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