Analysis of Differential Phase Shift Quantum Key Distribution
Monica Lavale
TL;DR
This paper reviews the implementation challenges of BB84 and B92 quantum key distribution protocols, highlighting issues related to the Uncertainty Principle and the difficulty in securing practical implementations.
Contribution
It critically analyzes current models of QKD protocols, emphasizing the need to consider quantum uncertainties for accurate security proofs.
Findings
Current models overlook Uncertainty Principle effects
Security proofs are difficult due to implementation issues
Practical QKD security needs more comprehensive analysis
Abstract
We review the implementation of two QKD protocols (BB84 and B92) keeping in mind that their implementations do not easily satisfy the requirement of use of single photons. We argue that current models do not take into account issues raised by the Uncertainty Principle related to time-location and transmission characteristics of single photons. This indicates that security proofs of current implementations even after the fixes for the recent successful hacks are made will be hard to obtain.
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Taxonomy
TopicsQuantum Information and Cryptography · Quantum Computing Algorithms and Architecture · Quantum and electron transport phenomena