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Re: Crack my sha256 hash
by
J35st3r
on 01/11/2013, 12:00:56 UTC
An interesting discussion at https://bitcointalk.org/index.php?topic=121264 regarding AES, but it applies equally to SHA256.

The link to http://www.schneier.com/blog/archives/2009/09/the_doghouse_cr.html gives the energy calculations, though these are for a 192 bit hash. 256 bits is 18446744073709551616 (18 quintillion 446 quadrillion 744 trillion 73 billion 709 million 551 thousand 616)  times harder.