Asymptotically secure All-or-nothing Quantum Oblivious Transfer

11/16/2021

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by   Ramij Rahaman, et al.

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Indian Statistical Instiute, Kolkata

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We present a device independently secure quantum scheme for p-threshold all-or-nothing oblivious transfer. Novelty of the scheme is that, its security does not depend – unlike the usual case – on any quantum bit commitment protocol, rather it depends on Hardy's argument for two-qubit system. This scheme is shown to be unconditionally secure against any strategy allowed by quantum mechanics. By providing a secure scheme for all-or-nothing quantum oblivious transfer, we have answered a long standing open problem, other than the quantum key distribution, whether there is any two-party quantum cryptographic protocol, which is unconditionally secure.