Paper 2016/120

Oblivious Transfer from Any Non-Trivial Elastic Noisy Channels via Secret Key Agreement

Ignacio Cascudo, Ivan Damgård, Felipe Lacerda, and Samuel Ranellucci


A $(\gamma,\delta)$-elastic channel is a binary symmetric channel between a sender and a receiver where the error rate of an honest receiver is $\delta$ while the error rate of a dishonest receiver lies within the interval $[\gamma, \delta]$. In this paper, we show that from \emph{any} non-trivial elastic channel (i.e., $0<\gamma<\delta<\frac{1}{2}$) we can implement oblivious transfer with information theoretic security. This was previously (Khurana et al., Eurocrypt 2016) only known for a subset of these parameters. Our technique relies on a new way to exploit protocols for information-theoretic key agreement from noisy channels. We also show that information theoretically secure commitments where the receiver commits follow from any non-trivial elastic channel.

Available format(s)
Cryptographic protocols
Publication info
Published by the IACR in TCC 2016
oblivious transferelastic channelskey agreementcommitments
Contact author(s)
ignacio @ math aau dk
2016-11-10: last of 4 revisions
2016-02-14: received
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Creative Commons Attribution


      author = {Ignacio Cascudo and Ivan Damgård and Felipe Lacerda and Samuel Ranellucci},
      title = {Oblivious Transfer from Any Non-Trivial Elastic Noisy Channels via Secret Key Agreement},
      howpublished = {Cryptology ePrint Archive, Paper 2016/120},
      year = {2016},
      note = {\url{}},
      url = {}
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