Faked states attack and quantum cryptography protocols

TL;DR

This paper analyzes the vulnerability of quantum cryptography protocols, specifically the Kak protocol, to faked states attacks that exploit real-world implementation weaknesses, highlighting the gap between theoretical security and practical vulnerabilities.

Contribution

It provides an analysis of the Kak quantum cryptography protocol's susceptibility to faked states attacks in real-world scenarios.

Findings

Successful demonstration of faked states attack on commercial QKD systems

Identification of implementation weaknesses in quantum cryptosystems

Assessment of the Kak protocol's vulnerability to such attacks

Abstract

Leveraging quantum mechanics, cryptographers have devised provably secure key sharing protocols. Despite proving the security in theory, real-world application falls short of the ideal. Last year, cryptanalysts completed an experiment demonstrating a successful eavesdropping attack on commercial quantum key distribution (QKD) systems. This attack exploits a weakness in the typical real-world implementation of quantum cryptosystems. Cryptanalysts have successfully attacked several protocols. In this paper, we examine the Kak quantum cryptography protocol and how it may perform under such attacks.