Unicity Distance of Quantum Encryption Protocols
Chong Xiang, Li Yang
TL;DR
This paper extends Shannon's unicity distance concept to quantum encryption protocols, revealing that some quantum protocols with short key reuse can have infinite unicity distance, indicating enhanced security.
Contribution
It introduces the unicity distance concept into quantum cryptography and shows that certain quantum protocols can achieve infinite unicity distance with key reuse.
Findings
Quantum protocols with short key reuse can have infinite unicity distance
Extension of classical cryptanalysis concepts to quantum encryption
Implications for security analysis of quantum encryption protocols
Abstract
Shannon presented the concept `unicity distance' for describing the security of secret key encryption protocols against various ciphertext-only attacks. We develop this important concept of cryptanalysis into the quantum context, and find that there exist quantum encryption protocols reusing a short key have infinite unicity distance.
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Taxonomy
TopicsCryptographic Implementations and Security · Quantum Computing Algorithms and Architecture · Chaos-based Image/Signal Encryption