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IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences

Matching oblivious transfer: how to exchange valuable data

Shin’ichiro Matsuo, Wakaha Ogata

Published Jan 1, 2003• 1 citation
OpenAlex

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When submitting ``Coin-Flipping-based Quantum Oblivious Transfer'' (quant-ph/0605027v4) to Indocrypt-2006, I received valuable reviews. Due to the attacks in these reviews, my major protocols, for cheat-sensitive and coin-flipping-based 2-1 oblivious transfers, are insecure. I would have withdrawn the paper. But I think I'd rather post the attacks made by the reviewer. Besides, as ``coin-flipping-based 2-1 OT'' is an important case-study in ``Two-party Models and the No-go Theorems'' (quant-ph/0608165), the paper is also touched by the attack. It will be reconsidered, and the case-study will be eliminated from it. I would like to thank the ``anonymous'' reviewer for those valuable attacks and comments.

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Key-exchange protocols have been overlooked as a possible means for implementing oblivious transfer (OT). In this article, we present protocols for mutual exchange of secrets, 1-out-of-2 OT and coin-flipping similar to the Diffie-Hellman protocol using the idea of obliviously exchanging encryption keys. Since the Diffie-Hellman scheme is widely used, our protocol may provide a useful alternative to the conventional methods for implementation of oblivious transfer and a useful primitive in building larger cryptographic schemes.

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Extending Oblivious Transfer Efficiently

Enrique Larraia

Lecture notes in computer science•Jan 1, 2015•10 citations
When submitting ``Coin-Flipping-based Quantum Oblivious Transfer'' (quant-ph/0605027v4) to Indocrypt-2006, I received valuable reviews. Due to the attacks in these reviews, my major protocols, for cheat-sensitive and coin-flipping-based 2-1 oblivious transfers, are insecure. I would have withdrawn the paper. But I think I'd rather post the attacks made by the reviewer. Besides, as ``coin-flipping-based 2-1 OT'' is an important case-study in ``Two-party Models and the No-go Theorems'' (quant-ph/0608165), the paper is also touched by the attack. It will be reconsidered, and the case-study will be eliminated from it. I would like to thank the ``anonymous'' reviewer for those valuable attacks and comments.
Key-exchange protocols have been overlooked as a possible means for implementing oblivious transfer (OT). In this article, we present protocols for mutual exchange of secrets, 1-out-of-2 OT and coin-flipping similar to the Diffie-Hellman protocol using the idea of obliviously exchanging encryption keys. Since the Diffie-Hellman scheme is widely used, our protocol may provide a useful alternative to the conventional methods for implementation of oblivious transfer and a useful primitive in building larger cryptographic schemes.