But we will be, maybe in 10 maybe in 20 years, but definitely sooner that we may think - and then, at that time bitcoin may be world currency...
So do you think quantum computers would break Bitcoin's security?
It would first need to crack SHA-256
http://miguelmoreno.net/wp-content/uploads/2013/05/fYFBsqp.jpgThe numbers are really giganormous.
2^256 is is about 1e77, or 1 followed by 77 zeroes.
This is a number not too far from that of the number of atoms in the whole observable universe which is 1e80 ... http://en.wikipedia.org/wiki/Observable_universe#Matter_content_.E2.80.94_number_of_atoms
This is also a billion billion billion times more than then number of atoms in the whole earth (about 1e50).
So any brute-force derived from Moore's Law will be completely unable to break SHA-256, and sheer computing power gains from Quantum computing (if they ever materialize, which they have not yet) will not either, at least until a sizeable portion of the observable universe is not brought to work in it.
Smart insight and unforeseen vulnerabilities could lead to a break tomorrow, or yesterday. But Quantum and Moore's Law? Nope.
