Re: [kernel-hardening] Re: HalfSipHash Acceptable Usage

From: Jason A. Donenfeld
Date: Wed Dec 21 2016 - 17:29:22 EST


On Wed, Dec 21, 2016 at 11:27 PM, Theodore Ts'o <tytso@xxxxxxx> wrote:
> And "with enough registers" includes ARM and MIPS, right? So the only
> real problem is 32-bit x86, and you're right, at that point, only
> people who might care are people who are using a space-radiation
> hardened 386 --- and they're not likely to be doing high throughput
> TCP connections. :-)

Plus the benchmark was bogus anyway, and when I built a more specific
harness -- actually comparing the TCP sequence number functions --
SipHash was faster than MD5, even on register starved x86. So I think
we're fine and this chapter of the discussion can come to a close, in
order to move on to more interesting things.