Counterfactual quantum certificate authorization

Abstract

We present a multi-partite protocol in a counterfactual paradigm. In counterfactual quantum cryptography, secure information is transmitted between two spatially separated parties even when there is no physical travel of particles transferring the information between them. We propose here a tripartite counterfactual quantum protocol for the task of certificate authorization. Here a trusted third party, Alice, authenticates an entity Bob (e.g., a bank) that a client Charlie wishes to securely transact with. The protocol is counterfactual with respect to either Bob or Charlie. We prove its security against a general incoherent attack, where Eve attacks single particles.

6 pages, 2 figures, close to the published version

References in corpus (4)

• Protocol for direct counterfactual quantum communication
• Security of "Counterfactual Quantum Cryptography"
• Stable single-photon interference in a 1 km fiber-optical Mach-Zehnder interferometer with continuous phase adjustment
• Semi-counterfactual Cryptography

Cited by in corpus (9)

• Quantum cryptography: key distribution and beyond
• Tripartite Counterfactual Quantum Cryptography
• Analysis of counterfactuality of counterfactual communication protocols
• How Quantum is Quantum Counterfactual Communication?
• Secure Quantum Communication with Orthogonal States
• Counterfactual distribution of cat states
• Orthogonal-state-based cryptography in quantum mechanics and local post-quantum theories
• Protocols for counterfactual and twin-field quantum digital signature
• Quantum counterfactuality with identical particles