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QKD Based on Symmetric Entangled Bernstein-Vazirani
Michael Ampatzis1, Theodore Andronikos1
1Department of Informatics, Ionian University, 7 Tsirigoti Square, 49100 Corfu, Greece.
Entropy (Basel, Switzerland)
|August 6, 2021
Summary
This study presents a new quantum key distribution (QKD) protocol using entanglement and a modified Bernstein-Vazirani algorithm for secure key exchange. It offers two symmetric variants, inspired by Diffie-Hellman, for efficient and novel key generation.
Area of Science:
- Quantum Information Science
- Cryptography
- Quantum Computing
Background:
- Quantum key distribution (QKD) offers enhanced security over classical methods.
- Entanglement-based protocols are a promising avenue for secure communication.
- Existing protocols may have limitations in efficiency or security against certain attacks.
Purpose of the Study:
- To introduce a novel entanglement-based quantum key distribution (QKD) protocol.
- To develop secure and efficient key distribution methods.
- To present two variants: a fully symmetric and a semi-symmetric protocol.
Main Methods:
- Utilizing a modified symmetric version of the Bernstein-Vazirani algorithm.
- Employing shared entangled pairs (EPR pairs) between spatially separated parties (Alice and Bob).
- Developing a fully symmetric protocol inspired by the Diffie-Hellman key exchange and a semi-symmetric variant.
Main Results:
- Demonstrated a novel entanglement-based QKD protocol with two variants.
- Analyzed the security performance of both protocols against eavesdropper attacks.
- Provided detailed examples illustrating practical operation.
Conclusions:
- The proposed protocols offer a secure and efficient method for quantum key distribution.
- The symmetric approach allows for the generation of entirely new keys.
- The entanglement-based strategy enhances the security and novelty of key exchange.
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