According to Konstantinos Karagiannis is the Chief Technology Officer for Security Consulting at BT Americas, the reason why computers were created in the first place was to help create and crack cryptography. In a session at the Open Source Summit in Los Angeles, Karagiannis argued that it is the race to crack modern cryptography that is fuelling the drive for quantum computing.
Quantum Computing is very different than current forms of silicon based computing. The allure of quantum computing is that it can make use of quantum states of matter, including entanglement and superposition, to achieve massive computer processing power