3 ms·
Bruce Schneier and others[1] have done the math on brute forcing 256 bit keys: even with a perfectly efficient computer using the least amount of energy possibl
by grandsham 10y ago
Bruce Schneier and others[1] have done the math on brute forcing 256 bit keys: even with a perfectly efficient computer using the least amount of energy possible, you would have to deplete the entire energy content of the Sun to just iterate over a 225 bit keyspace once, let alone do anything meaningful with those keys.
Moore's Law doesn't really factor into it.
[1]http://security.stackexchange.com/a/6149 http://security.stackexchange.com/a/6149
- uxcn 10y agoIt's estimated there are 10^80 atoms [1] in the visible universe, so 2^256 is definitely a huge number. I didn't realize 256 bit brute force was nigh feasible with only a solar system. I'm a bit surprised the quantum algorithm only gives a polynomial speedup. [1] https://en.wikipedia.org/wiki/Observable_universe#Matter_content https://en.wikipedia.org/wiki/Observable_universe#Matter_con...
- learningbot 10y ago10^80 = (10^3)^80/3 = 1000^80/3 = 1000^26.67 2^256 = (2^10)^25.6 = 1024^25.6 These number seem very close.
- andrewflnr 10y agoSure it does. It just happens to necessitate our transition to Kardashev III.