Faked states attack and quantum cryptography protocols

Leveraging quantum mechanics, cryptographers have devised provably secure key sharing protocols[4], [3], [6], [17]. 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[12]. This attack exploits a weakness in the typical real-world implementation of quantum cryptosystems. Cryptanalysts have successfully attacked several protocols[7]. In this paper, we examine the Kak quantum cryptography protocol[11] how it may perform under such attacks.