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

Daan Leermakers; Boris Skoric

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 cryptography quantum 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: 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},
      url = {https://eprint.iacr.org/2019/875}
}