Unconditionally secure commitment in position-based quantum cryptography

Abstract

A new commitment scheme based on position-verification and non-local quantum correlations is presented here for the first time in literature. The only credential for unconditional security is the position of committer and non-local correlations generated; neither receiver has any pre-shared data with the committer nor does receiver require trusted and authenticated quantum/classical channels between him and the committer. In the proposed scheme, receiver trusts the commitment only if the scheme itself verifies position of the committer and validates her commitment through non-local quantum correlations in a single round. The position-based commitment scheme bounds committer to reveal valid commitment within allocated time and guarantees that the receiver will not be able to get information about commitment unless committer reveals. The scheme works for the commitment of both bits and qubits and is equally secure against committer/receiver as well as against any third party who may have interests in destroying the commitment. Our proposed scheme is unconditionally secure in general and evades Mayers and Lo-Chau attacks in particular.

7 pages, Final version

References in corpus (20)

• Quantum cryptography: Public key distribution and coin tossing
• Unconditionally secure quantum bit commitment is impossible
• Is Quantum Bit Commitment Really Possible?
• Unconditionally Secure Bit Commitment
• Superselection rules and quantum protocols
• Unconditionally Secure Bit Commitment by Transmitting Measurement Outcomes
• Simplified instantaneous non-local quantum computation with applications to position-based cryptography
• Reexamination of Quantum Bit Commitment: the Possible and the Impossible
• Quantum Tagging: Authenticating Location via Quantum Information and Relativistic Signalling Constraints
• Experimental bit commitment based on quantum communication and special relativity
• Unconditionally Secure Bit Commitment with Flying Qudits
• Location-Dependent Communications using Quantum Entanglement
• Insecurity of position-based quantum cryptography protocols against entanglement attacks
• Experimental unconditionally secure bit commitment
• Secure bit commitment from relativistic constraints
• Quantum Tagging for Tags Containing Secret Classical Data
• Security Details for Bit Commitment by Transmitting Measurement Outcomes
• Quantum Location Verification in Noisy Channels
• Secure positioning and non-local correlations
• Position-based quantum cryptography over untrusted networks

Cited by in corpus (7)

• Quantum non-locality, causality and mistrustful cryptography
• Secure positioning and non-local correlations
• Secure and authenticated quantum secret sharing
• Delayed choice relativistic quantum bit commitment with arbitrarily long commitment time
• The causal structure of Minkowski space time: possibilities and impossibilities of secure positioning
• Quantum cryptography -- an information theoretic security
• Insecurity of a relativistic quantum commitment scheme