Paper 2019/875

Quantum Alice and Silent Bob: Qubit-based Quantum Key Recycling with almost no classical communication

Daan Leermakers and Boris Skoric

Abstract

We introduce a Quantum Key Recycling (QKR) protocol that needs no classical communication from Alice to Bob. Alice sends only a cipherstate, which consists of qubits that are individually measured by Bob. Bob merely has to respond with an authenticated one-bit accept/reject classical message. Compared to Quantum Key Distribution (QKD), QKR has reduced round complexity. Compared to other qubit-wise QKR protocols, our scheme has far less classical communication. We provide a security proof in the universal composability framework and find that the communication rate is asymptotically the same as for QKD with one-way postprocessing.

Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Preprint. MINOR revision.
Keywords
quantum cryptographyquantum key recycling
Contact author(s)
b skoric @ tue nl
History
2019-09-25: revised
2019-08-01: received
See all versions
Short URL
https://ia.cr/2019/875
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2019/875,
      author = {Daan Leermakers and Boris Skoric},
      title = {Quantum Alice and Silent Bob: Qubit-based Quantum Key Recycling with almost no classical communication},
      howpublished = {Cryptology ePrint Archive, Paper 2019/875},
      year = {2019},
      note = {\url{https://eprint.iacr.org/2019/875}},
      url = {https://eprint.iacr.org/2019/875}
}
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.