21 Apr 2010
(updated 21 Apr 2010 at 04:39 UTC) »
I'm finally off Network Solutions. When they finally
delivered the "authorization code" (first stalling for four
days, for no reason) they offered a year's service for $16.
Never, during 15 years as a regular customer, did they ever
offer any $16 service short of a 7 year contract. Of course
Gandi offers better every year, no strings attached (and
even less for the despised ".biz", ".me", and ".co.uk"
I'm a little late, but my Ada Lovelace Day choice for
admired female hacker is Emilia
Käsper, who coded implementations of AES-CTR and
AES-GCM that run in under 10 cycles/byte, using SSE3
instructions, and defeat timing attacks besides.
Each of 8 128-bit registers holds a bit from each byte in
128 bytes of plaintext: paper,
It isn't clear from the slides, but she shuffles the bits to
their various registers using an SSSE3 instruction (and a
"shuffle unit") that isn't in current AMD chips. Besides
the speed, this is important because timing attacks on
regular AES implementations are astonishingly easy.
A faster cipher would work on 128-byte blocks and just skip
the bit shuffling. It wouldn't interoperate with anybody,
but would be equally secure. If you went that route, I
gather that one step of AES has turned out not to add any
security, so you could skip that bit, too. You could call
your cipher Skiphack. (Little historical joke there.)