An approach to experimental photonic quantum digital signatures in fiber

Ross J Donaldson, Robert John Collins, Vedran Dunjko, Patrick J Clarke, Erika Andersson, John Jeffers, Gerald Stuart Buller

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As society becomes more reliant on electronic communication and transactions, ensuring the security of these interactions becomes more important. Digital signatures are a widely used form of cryptography which allows parties to certify the origins of their communications, meaning that one party, a sender, can send information to other parties in such a way that messages cannot be forged. In addition, messages are transferrable, meaning that a recipient who accepts a message as genuine can be sure that if it is forwarded to another recipient, it will again be accepted as genuine. The classical digital signature schemes currently employed typically rely on computational complexity for security. Quantum digital signatures offer the potential for increased security. In our system, quantum signature states are passed through a network of polarization maintaining fiber interferometers (a multiport) to ensure that recipients will not disagree on the validity of a message. These signatures are encoded in the phase of photonic coherent states and the choice of photon number, signature length and number of possible phase states affects the level of security possible by this approach. We will give a brief introduction into quantum digital signatures and present results from our experimental demonstration system.

Original languageEnglish
Title of host publicationEmerging Technologies in Security and Defence; and Quantum Security II; and Unmanned Sensor Systems X
EditorsKeith L Lewis, Richard C Hollins, Thomas J Merlet, Mark T Gruneisen, Miloslav Dusek, John G Rarity, Edward M Carapezza
PublisherSPIE
Number of pages10
ISBN (Print)978-0-8194-9768-0
DOIs
Publication statusPublished - 2013
EventConference on Emerging Technologies in Security and Defence; and Quantum Security II; and Unmanned Sensor Systems X - Dresden, Germany
Duration: 23 Sep 201326 Sep 2013

Publication series

NameProceedings of SPIE
Volume8899
ISSN (Print)1996-756X
ISSN (Electronic)0277-786X

Conference

ConferenceConference on Emerging Technologies in Security and Defence; and Quantum Security II; and Unmanned Sensor Systems X
CountryGermany
CityDresden
Period23/09/1326/09/13

Keywords

  • KEY DISTRIBUTION-SYSTEM
  • CRYPTOGRAPHY

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