A quantum computer taps directly into the fundamental fabric of reality – the strange and counter intuitive world of quantum mechanics – to speed computation.
The computer returns many very good answers in a short amount of time – 10,000 answers in one second. This gives the user not only the optimal solution or a single answer, but also other alternatives to choose from.
Companies such as NASA, Google, the NSA and others already have one of these.
What does this mean for security in the future ? is any encryption safe ?
See http://www.dwavesys.com/quantum-computing for more info.