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We use pairings over elliptic curves to give a collusion-resistant traitor tracing scheme where the sizes of public keys, secret keys, and ciphertexts are independent of the number of users. Prior constructions from pairings had size \(\varOmega (N^{1/3})\) . An additional consequence of our techniques is general result showing that attribute-based encryption for circuits generically implies optimal traitor tracing.

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Optimal Traitor Tracing from Pairings

  • 会议论文

  • 发表日期：

    2025年

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  • Mark Zhandry

摘要

We use pairings over elliptic curves to give a collusion-resistant traitor tracing scheme where the sizes of public keys, secret keys, and ciphertexts are independent of the number of users. Prior constructions from pairings had size \(\varOmega (N^{1/3})\) . An additional consequence of our techniques is general result showing that attribute-based encryption for circuits generically implies optimal traitor tracing.