An Oblivious Transfer Protocol with Log-Squared Communication

  title={An Oblivious Transfer Protocol with Log-Squared Communication},
  author={Helger Lipmaa},
  journal={IACR Cryptology ePrint Archive},
We propose a one-round 1-out-of-n computationally-private information retrieval protocol for `-bit strings with low-degree polylogarithmic receivercomputation, linear sender-computation and communication Θ(k · log n + ` · log n), where k is a possibly non-constant security parameter. The new protocol is receiver-private if the underlying length-flexible additively homomorphic public-key cryptosystem is IND-CPA secure. It can be transformed to a one-round computationally receiver-private and… CONTINUE READING
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