Summary of Quantum Cryptography
Quantum cryptography applies principles of quantum mechanics to encrypt messages in a way that it is never read by anyone outside of the intended recipient. It takes advantage of quantum’s multiple states, coupled with its "no change theory," which means it cannot be unknowingly interrupted. Why need quantum cryptography? Development of quantum computer, capable to break public-key cryptography algorithm Key distribution The task of distributing secret keys between transmitter and receiver by providing security properties. If the key is known to the third party (forger/eavesdropper) then the whole security mechanism becomes worthless. Two aspects for Key Management Distribution of public keys. Use of public-key encryption to distribute secrets. The public key can be distributed in four ways 1. Public announcement The public key is broadcasted to everyone. Weakness : forgery. Anyone can create a key claiming to be someone else and broadcast it. Until forgery is discovered can...