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Date: Fri, 16 Dec 2016 15:44:27 -0500
From: Daniel Micay <danielmicay@...il.com>
To: kernel-hardening@...ts.openwall.com, "Jason A. Donenfeld"
<Jason@...c4.com>
Cc: Jean-Philippe Aumasson <jeanphilippe.aumasson@...il.com>, George Spelvin
<linux@...encehorizons.net>, Andi Kleen <ak@...ux.intel.com>, David Miller
<davem@...emloft.net>, David Laight <David.Laight@...lab.com>, Eric Biggers
<ebiggers3@...il.com>, Hannes Frederic Sowa <hannes@...essinduktion.org>,
Linux Crypto Mailing List <linux-crypto@...r.kernel.org>, LKML
<linux-kernel@...r.kernel.org>, Andy Lutomirski <luto@...capital.net>,
Netdev <netdev@...r.kernel.org>, Linus Torvalds
<torvalds@...ux-foundation.org>, Theodore Ts'o <tytso@....edu>,
vegard.nossum@...il.com, "Daniel J . Bernstein" <djb@...yp.to>
Subject: Re: Re: [PATCH v5 1/4] siphash: add
cryptographically secure PRF
On Fri, 2016-12-16 at 11:47 -0800, Tom Herbert wrote:
>
> That's about 3x of jhash speed (7 nsecs). So that might closer
> to a more palatable replacement for jhash. Do we lose any security
> advantages with halfsiphash?
Have you tested a lower round SipHash? Probably best to stick with the
usual construction for non-DoS mitigation, but why not try SipHash 1-3,
1-2, etc. for DoS mitigation?
Rust and Swift both went with SipHash 1-3 for hash tables.
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