> why we're not dramatically ramping up key sizes across the board on all encryption?
because no one thinks there is a reason to, no one has any fear that classical computers will catch up with RSA-2048/AES-128 before their grand children are dead.
post-quantum crypt stuff is happening and people are planning how to migrate to it.
Ok, preimage resistance is still pretty strong, but it has been reduced enough that I wouldn't trust it remaining above practical attacks beyond the next decade.
because no one thinks there is a reason to, no one has any fear that classical computers will catch up with RSA-2048/AES-128 before their grand children are dead.
post-quantum crypt stuff is happening and people are planning how to migrate to it.