Quantum Key Agreement Through Information Reconciliation and Privacy Amplification

This paper considers the problem of security in practical implementation of Quantum Key Agreement applying the concept of Information Reconciliation and Privacy Amplification targeted towards the computer science community. Firstly, a scheme is proposed which is operable in presence of noise using procedure called 'Entanglement purification' on Bell states to detect presence of adversary and then a protocol that minimizes the entropy loss and thus increasing the length of shared key between two communicating parties in presence of active computationally unbounded adversary.