Quantum Information Processing

, Volume 14, Issue 4, pp 1451–1468 | Cite as

Toward secure communication using intra-particle entanglement

  • S. Adhikari
  • Dipankar Home
  • A. S. Majumdar
  • A. K. Pan
  • Akshata Shenoy H.
  • R. SrikanthEmail author


We explore the use of the resource of intra-particle entanglement for secure quantum key distribution in the device-independent scenario. By virtue of the local nature of such entanglement, Bell tests must be implemented locally, which leads to a natural decoupling of device errors from channel errors. We consider a side-channel attack on the sender’s state preparation device, for which the intra-particle entanglement-based scheme is shown to be more secure than the one that uses separable states. Of practical relevance is the fact that such entanglement can be easily generated using linear optics.


Cryptography Intra-particle entanglement Bell’s inequality Side channel 



ASM and DH acknowledge support from the Department of Science and Technology, India (DST) Project SR/S2/LOP-08/2013, and RS for the DST-supported Project SR/S2/LOP-02/2012. DH also thanks the Centre for Science, Kolkata for support.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • S. Adhikari
    • 1
  • Dipankar Home
    • 2
  • A. S. Majumdar
    • 3
  • A. K. Pan
    • 4
  • Akshata Shenoy H.
    • 5
  • R. Srikanth
    • 6
    Email author
  1. 1.Indian Institute of TechnologyJodhpurIndia
  2. 2.CAPSS, Department of PhysicsBose InstituteKolkataIndia
  3. 3.S. N. Bose National Centre for Basic SciencesKolkataIndia
  4. 4.Department of PhysicsNITPatnaIndia
  5. 5.Electrical Communication Engineering DepartmentIIScBangaloreIndia
  6. 6.Poornaprajna Institute of Scientific ResearchBangaloreIndia

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