> Increases in computing power alone can't render SHA256 insecure; that can be proven by thermodynamic/size-of-the-universe arguments.
Fascinating. Could you please recommend a source where a curious layman could learn more about this?
I posted a link and some further analysis in this comment: https://news.ycombinator.com/item?id=29883965
Increases in computing power alone can't render SHA256 insecure; that can be proven by thermodynamic/size-of-the-universe arguments. You need an actual cryptographic weakness.