Sciencemadness Discussion Board

Quantum Computers

goldenoranges - 21-2-2014 at 11:19

What is your opinion on them? The are able to crack almost any encryption, including PGP. If they are out for companies to buy you can bet the government has had them.

I know I would like to get my hands on one. Bye Bye secure websites :D

Hey look, it takes up an entire room! Remind you of something?
http://www.dwavesys.com/d-wave-two%E2%84%A2-system


[Edited on 21-2-2014 by goldenoranges]

gregxy - 22-2-2014 at 16:42

Not likely to happen soon. See below. This explains why
Dwave is a small company and the only one with an offering in this space.

"
Some companies, however, claim to already be producing small quantum computers. A Canadian firm, D-Wave Systems , says it has been making quantum computers since 2009. In 2012, it sold a $10 million version to Google, NASA and the Universities Space Research Association, according to news reports.

That quantum computer, however, would never be useful for breaking public key encryption like RSA.

“Even if everything they’re claiming is correct, that computer, by its design, cannot run Shor’s algorithm,” said Matthew Green, a research professor at the Johns Hopkins University Information Security Institute, referring to the algorithm that could be used to break encryption like RSA.
"

From:
http://www.washingtonpost.com/world/national-security/nsa-se...

[Edited on 23-2-2014 by gregxy]

Chemosynthesis - 2-3-2014 at 16:54

Quantum computers would not make cryptography irrelevant....
Yes, they would factor primes and solve ECC with ease, but the introduction of qubits would make unbreakable (according to Simon Singh, anyway) encryption called Quantum Cryptography.

jock88 - 4-3-2014 at 16:14


Can they challange BitCoin etc?

thesmug - 4-3-2014 at 20:46

Quote: Originally posted by jock88  

Can they challange BitCoin etc?

Possibly. They would be perfect mining rigs, though :D

[Edited on 3/5/14 by thesmug]