Cryptology ePrint Archive: Report 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.
Category / Keywords: cryptographic protocols / quantum cryptography, quantum key recycling
Date: received 30 Jul 2019, last revised 25 Sep 2019
Contact author: b skoric at tue nl
Available format(s): PDF | BibTeX Citation
Version: 20190925:073352 (All versions of this report)
Short URL: ia.cr/2019/875
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