Quantum Alice and Silent Bob: qubit-based quantum key recycling with almost no classical communication

Daan Leermakers; Boris Škorić

Quantum Alice and Silent Bob: qubit-based quantum key recycling with almost no classical communication

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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 proof similar to [1] and find that the communication rate is asymptotically the same as for QKD with one-way postprocessing.

Original language	English
Number of pages	13
Publication status	Published - 2019

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Leermakers, D., & Škorić, B. (2019). Quantum Alice and Silent Bob: qubit-based quantum key recycling with almost no classical communication.

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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 proof similar to [1] and find that the communication rate is asymptotically the same as for QKD with one-way postprocessing.",

author = "Daan Leermakers and Boris {\v S}kori{\'c}",

year = "2019",

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N2 - 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 proof similar to [1] and find that the communication rate is asymptotically the same as for QKD with one-way postprocessing.

AB - 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 proof similar to [1] and find that the communication rate is asymptotically the same as for QKD with one-way postprocessing.

M3 - Other contribution

ER -