[seleniumBubbles]

Nice list! One I’d add: one of my all-time favorite cryptography-related quotes is from Bruce Schneier‘s Applied Cryptography, talking about key length:

> These numbers have nothing to do with the technology of the devices; they are the maximums that thermodynamics will allow. And they strongly imply that 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.

Full context: https://www.schneier.com/blog/archives/2009/09/the_doghouse_...

[tzs]

That argument only applies to irreversible computation. The errata for Applied Cryptography corrects this:

> The section on "Thermodynamic Limitations" is not quite correct. It requires kT energy to set or clear a single bit because these are irreversible operations. However, complementing a bit is reversible and hence has no minimum required energy. It turns out that it is theoretically possible to do any computation in a reversible manner except for copying out the answer. At this theoretical level, energy requirements for exhaustive cryptanalysis are therefore linear in the key length, not exponential.