Seth Lloyd, Ultimate physical limits to computation:
http://arxiv.org/abs/quant-ph/9908043
As an example, quantitative bounds are put to the computational
power of an ‘ultimate laptop’ with a mass of one kilogram confined to a
volume of one liter.
...
The ultimate laptop performs 2mc^2 /π¯h
[Note subject line change]
Jerry Leichter writes:
Since people do keep bringing up Moore's Law in an attempt to justify
larger keys our systems stronger than cryptography, it's worth
keeping in mind that we are approaching fairly deep physical limits.
I wrote about this on this list
On Aug 11, 2009, at 2:47 PM, Hal Finney wrote:
[Note subject line change]
Jerry Leichter writes:
Since people do keep bringing up Moore's Law in an attempt to justify
larger keys our systems stronger than cryptography, it's worth
keeping in mind that we are approaching fairly deep physical
