Cryptanalysis of a Practical Quantum Key Distribution With Polarization-Entangled Photons
Quantum Physics
2007-05-23 v1
Abstract
Recently, a quantum key exchange protocol has been described, which served as basis for securing an actual bank transaction by means of quantum cryptography [quant-ph/0404115]. Here we show, that the authentication scheme applied is insecure in the sense that an attacker can provoke a situation where initiator and responder of a key exchange end up with different keys. Moreover, it may happen that an attacker can decrypt a part of the plaintext protected with the derived encryption key.
Cite
@article{arxiv.quant-ph/0407130,
title = {Cryptanalysis of a Practical Quantum Key Distribution With Polarization-Entangled Photons},
author = {Thomas Beth and Joern Mueller-Quade and Rainer Steinwandt},
journal= {arXiv preprint arXiv:quant-ph/0407130},
year = {2007}
}
Comments
6 pages