"... brute-force attacks against 256-bit keys will be infeasible until computers are built from something other than matter and occupy something other than space."
https://security.stackexchange.com/a/82412
"... brute-force attacks against 256-bit keys will be infeasible until computers are built from something other than matter and occupy something other than space."
https://security.stackexchange.com/a/82412