International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 27 June 2020

Ehsan Ebrahimi, Céline Chevalier, Marc Kaplan, Michele Minelli
ePrint Report ePrint Report
In this note, we study the security of oblivious transfer protocols in the presence of adversarial superposition queries. We define a security notion for the sender against a corrupted receiver that makes a superposition query. We present an oblivious transfer protocol that is secure against a quantum receiver restricted to a classical query but it is insecure when the receiver makes a quantum query. In addition, we present an OT protocol that resists to the attack presented in this paper. However, we leave presenting a security proof for this protocol as a direction for the future work.

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