Re: Byte Addressability And Beyond

On Mon, 3 Jun 2024 08:03:53 -0000 (UTC)
Lawrence D'Oliveiro <ldo@nz.invalid> wrote:

On Thu, 30 May 2024 18:31:46 +0000, MitchAlsup1 wrote:
 

30 years ago you could say the same thing about encryption. 

 
I don’t think newer CPUs have been optimized for encryption. Instead,
we see newer encryption algorithms (or ways of using them) that work
better on current CPUs.

I think moderate efficiency on CPU, not too low, but not high either,
is a requirement for (symmetric-key) cipher. Esp. when the key is
128-bit or shorter.

For example, when I was first learning about
computer encryption, I was told that CBC (“Cipher-Block Chaining”)
mode was teh hawtness,

CBC decrypt is easily parallelized. Encrypt - not so
much.

but nowadays it’s all about GFC (“Galois-Field
Counter”) mode.

GCM is far more common spelling.