Quantum cryptography definition
Quantum cryptography, also called quantum encryption, 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.
Performing these tasks requires a quantum computer, which have the immense computing power to encrypt and decrypt data. A quantum computer could quickly crack current public-key cryptography.
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