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- W3029381361 abstract "Fingerprinting provides a means of tracing unauthorized redistribution of digital data by individually marking each authorized copy with a personalized serial number. In order to prevent a group of users from collectively escaping identification, collusion-secure fingerprinting codes have been proposed. In this paper, we introduce a new construction of a collusion-secure fingerprinting code which is similar to a recent construction by Tardos but achieves shorter code lengths and allows for codes over arbitrary alphabets. We present results for `symmetric' coalition strategies. For binary alphabets and a false accusation probability $$varepsilon_1$$ , a code length of $$mapprox pi^2 c_0^2lnfrac{1}{varepsilon_1}$$ symbols is provably sufficient, for large c 0, to withstand collusion attacks of up to c 0 colluders. This improves Tardos' construction by a factor of 10. Furthermore, invoking the Central Limit Theorem in the case of sufficiently large c 0, we show that even a code length of $$mapprox 1/2pi^2 c_0^2lnfrac{1}{varepsilon_1}$$ is adequate. Assuming the restricted digit model, the code length can be further reduced by moving from a binary alphabet to a q-ary alphabet. Numerical results show that a reduction of 35% is achievable for q = 3 and 80% for q = 10." @default.
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- W3029381361 date "2007-01-01" @default.
- W3029381361 modified "2023-09-23" @default.
- W3029381361 title "Symmetric Tardos fingerprinting codes for arbitrary alphabet sizes." @default.
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