A Parallel Repetition Theorem for Leakage Resilience

  title={A Parallel Repetition Theorem for Leakage Resilience},
  author={Zvika Brakerski and Yael Tauman Kalai},
  journal={IACR Cryptology ePrint Archive},
A leakage resilient encryption scheme is one which stays secure even against an attacker that obtains a bounded amount of side information on the secret key (say λ bits of “leakage”). A fundamental question is whether parallel repetition amplifies leakage resilience. Namely, if we secret share our message, and encrypt the shares under two independent keys, will the resulting scheme be resilient to 2λ bits of leakage? Surprisingly, Lewko and Waters (FOCS 2010) showed that this is false. They… CONTINUE READING
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