Location-Oblivious Data Transfer with Flying Entangled Qudits

Abstract

We present a simple and practical quantum protocol involving two mistrustful agencies in Minkowski space, which allows Alice to transfer data to Bob at a spacetime location that neither can predict in advance. The location depends on both Alice's and Bob's actions. The protocol guarantees unconditionally to Alice that Bob learns the data at a randomly determined location; it guarantees to Bob that Alice will not learn the transfer location even after the protocol is complete. The task implemented, transferring data at a space-time location that remains hidden from the transferrer, has no precise analogue in non-relativistic quantum cryptography. It illustrates further the scope for novel cryptographic applications of relativistic quantum theory.

References updated. Published version

References in corpus (3)

• Unconditionally Secure Bit Commitment with Flying Qudits
• Location-Dependent Communications using Quantum Entanglement
• Variable Bias Coin Tossing

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• A No-summoning theorem in Relativistic Quantum Theory
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• Multiphoton and side-channel attacks in mistrustful quantum cryptography
• One-out-of-$m$ spacetime-constrained oblivious transfer
• Deterministic Relativistic Quantum Bit Commitment
• Superoscillations underlying remote state preparation for relativistic fields
• Quantum non-locality, causality and mistrustful cryptography
• Secure positioning and non-local correlations
• Unconditionally secure relativistic multi-party biased coin flipping and die rolling
• Localizing and excluding quantum information; or, how to share a quantum secret in spacetime
• Secure and Robust Transmission and Verification of Unknown Quantum States in Minkowski Space
• Distributing bipartite quantum systems under timing constraints
• Quantum oblivious transfer: a short review