IACR News item: 13 February 2016
Ignacio Cascudo, Ivan Damgård, Felipe Lacerda, Samuel Ranellucci
ePrint Report
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.
Additional news items may be found on the IACR news page.