SHA question

[Peter Corlett]

On 13 Jan 2010, at 14:40, Philip Newton wrote:
[...]
> Well, that said, is the "very low chance" not on the order of the
> chance that you'll be run over by a bus in the morning, or that one of
> the files will be changed through cosmic rays or bit rot in the
> magnetic domains of the hard disk platter?

In the case of SHA-256, the odds are low enough that the universe is likely to end before you find a collision.