[Resource Topic] 2004/336: Oblivious Transfer Is Symmetric

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Oblivious Transfer Is Symmetric

Authors: Stefan Wolf, Jürg Wullschleger


We show that oblivious transfer of bits from A to B can be
obtained from a single instance of the same primitive from B to A.
Our reduction is perfect and shows that oblivious transfer is in fact
a symmetric functionality. This solves an open problem posed by
Crépeau and Sántha in 1991.

ePrint: https://eprint.iacr.org/2004/336

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