Quantum bit commitment with a composite evidence

Srikanth, R.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3062

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DC Field	Value	Language
dc.contributor.author	Srikanth, R.	-
dc.date.accessioned	2007-06-21T08:31:50Z	-
dc.date.available	2007-06-21T08:31:50Z	-
dc.date.issued	2004-03-23	-
dc.identifier.citation	Physica Scripta, 2004, Vol.70, p343-346	en
dc.identifier.issn	0031-8949	-
dc.identifier.issn	1402-4896 (Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/3062	-
dc.description	Restricted Access.	en
dc.description.abstract	Entanglement-based attacks, which are subtle and powerful, are usually believed to render quantum bit commitment insecure. We point out that the no-go argument leading to this view implicitly assumes the evidence-of-commitment to be a monolithic quantum system. We argue that more general evidence structures, allowing for a composite, hybrid (classical–quantum) evidence, conduce to improved security. In particular, we present and prove the security of the following protocol Bob sends Alice an anonymous state. She inscribes her commitment b by measuring part of it in the + (for b = 0) or × (for b = 1) basis. She then communicates to him the (classical) measurement outcome Rx and the partmeasured anonymous state interpolated into other, randomly prepared qubits as her evidence-of-commitment.	en
dc.format.extent	249374 bytes	-
dc.format.mimetype	application/pdf	-
dc.language.iso	en	en
dc.publisher	IOP Publishing Ltd.	en
dc.relation.uri	http://dx.doi.org/10.1088/0031-8949/70/6/002	en
dc.rights	2004 IOP Publishing Ltd.	en
dc.title	Quantum bit commitment with a composite evidence	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

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