3 ms·
256 bit symmetric cryptography keys are a bit like picking one atom in the universe (10^80 atoms, or 10000000000000000000000000000000000000000000000000000000000
by oconnore 2y ago
256 bit symmetric cryptography keys are a bit like picking one atom in the universe (10^80 atoms, or 100000000000000000000000000000000000000000000000000000000000000000000000000000000). Your opponent would have to test half of the atoms in the universe to have a reasonable chance of getting the right key.
That's generally understood to be not feasible.
- alwayslikethis 2y agohttps://www.schneier.com/blog/archives/2009/09/the_doghouse_cr.html https://www.schneier.com/blog/archives/2009/09/the_doghouse_... It's more than that. Simply incrementing your way through a 256 bit counter is impossible by the thermodynamic cost alone.
- swijck 2y agoCorrect. Better to get into other forms of cryptography than pointlessly increase the numbers. We need to think more about PQ proofing.
- tatersolid 2y agoAES-256 is already post-quantum secure; what exactly are you suggesting?
- brokenmachine 2y agoHe could get lucky though. :-P