Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/3062
Title: | Quantum bit commitment with a composite evidence |
Authors: | Srikanth, R. |
Issue Date: | 23-Mar-2004 |
Publisher: | IOP Publishing Ltd. |
Citation: | Physica Scripta, 2004, Vol.70, p343-346 |
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. |
Description: | Restricted Access. |
URI: | http://hdl.handle.net/2289/3062 |
ISSN: | 0031-8949 1402-4896 (Online) |
Alternative Location: | http://dx.doi.org/10.1088/0031-8949/70/6/002 |
Copyright: | 2004 IOP Publishing Ltd. |
Appears in Collections: | Research Papers (LAMP) |
Files in This Item:
File | Description | Size | Format | |
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2004 PhyScr 70 p343.pdf Restricted Access | Restricted Access | 243.53 kB | Adobe PDF | View/Open Request a copy |
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