Increasing the protocol gain of quantum cryptography

الملخص EN

Quantum cryptography is a technique to distribute a sequence of truly random and unconditionally secure bits over a secure communication by applying the phenomena of quantum physics.

The distributed secret bits perform the secret key which is used later to encrypt messages with an encryption algorithm, usually the One-Time-Pad is used.

Quantum Key Distribution solves the security problem in classical cryptography by depending on the laws of physics which is focusing on the physics of information.

Quantum protocol gain usually is low due to the quantum channel noise and the difference between the photon polarization at the sender and receiver side; in this research, a method is proposed to increase the protocol gain without decreasing the security level of quantum key.

BB84 quantum key distribution algorithm is implemented and simulated with MATLAB R2010a simulation ; and a comparison is made with A.

Singh and N.

Sharma [14] results.