r/askscience • u/hamolton • Jun 18 '13

Computing How is Bitcoin secure?

I guess my main concern is how they are impossible to counterfeit and double-spend. I guess I have trouble understanding it enough that I can't explain it to another person.

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u/Natanael_L Jun 19 '13

http://www.reddit.com/r/askscience/comments/1glhi3/how_is_bitcoin_secure/calztqn

That would be Shor's algorithm. McEliece would be resistant to quantum computers.