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Improved versions of Tardos' fingerprinting scheme

机译:塔多斯指纹方案的改进版

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摘要

We study the Tardos' probabilistic fingerprinting scheme and show that its codeword length may be shortened by a factor of approximately 4. We achieve this by retracing Tardos' analysis of the scheme and extracting from it all constants that were arbitrarily selected. We replace those constants with parameters and derive a set of inequalities that those parameters must satisfy so that the desired security properties of the scheme still hold. Then we look for a solution of those inequalities in which the parameter that governs the codeword length is minimal. A further reduction in the codeword length is achieved by decoupling the error probability of falsely accusing innocent users from the error probability of missing all colluding pirates. Finally, we simulate the Tardos scheme and show that, in practice, one may use codewords that are shorter than those in the original Tardos scheme by a factor of at least 16.
机译:我们研究了Tardos的概率指纹识别方案,并表明其码字长度可以缩短约4倍。我们通过追溯Tardos对方案的分析并从中提取任意选择的常数来实现这一目标。我们用参数替换这些常数,并得出这些参数必须满足的一组不等式,以使方案的所需安全性仍然成立。然后,我们寻找那些控制代码字长度的参数最小的不等式的解决方案。通过将错误指控无辜用户的错误概率与错过所有串通海盗的错误概率解耦,可以进一步减少码字长度。最后,我们模拟了Tardos方案,并表明,实际上,人们可以使用比原始Tardos方案短至少16倍的代码字。

著录项

  • 来源
    《Designs, Codes and Crytography》 |2008年第1期|p.79-103|共25页
  • 作者

    Oded Blayer; Tamir Tassa;

  • 作者单位

    Department of Mathematics and Computer Science, The Open University of Israel, 108 Ravutzki St., Ra'anana, Israel;

    Department of Mathematics and Computer Science, The Open University of Israel, 108 Ravutzki St., Ra'anana, Israel;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fingerprinting; watermarking; traitor tracing schemes;

    机译:指纹水印叛徒追踪方案;

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