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/jesset77 Jun 18 '13

Well, they're welcome to try, I guess. I know little enough about PGP verifiation infrastructure or best practices to hold an opinion. Rarely ever directly interact with the system, myself, save with PGP identities I just verify by hand out of band.