netdev - Re: Extensible hashing and RCU

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Message-ID: <f2b55d220702201209m6d6a276fj75f3462cdf6daeb@mail.gmail.com>
Date:	Tue, 20 Feb 2007 12:09:59 -0800
From:	"Michael K. Edwards" <medwards.linux@...il.com>
To:	"Evgeniy Polyakov" <johnpol@....mipt.ru>
Cc:	"Eric Dumazet" <dada1@...mosbay.com>,
	"David Miller" <davem@...emloft.net>, akepner@....com,
	linux@...izon.com, netdev@...r.kernel.org, bcrl@...ck.org
Subject: Re: Extensible hashing and RCU

On 2/20/07, Michael K. Edwards <medwards.linux@...il.com> wrote:
> Correct.  That's called a "weak hash", and Jenkins is known to be a
> thoroughly weak hash.  That's why you never, ever use it without a
> salt, and you don't let an attacker inspect the hash output either.

Weak in a cryptographic sense, of course.  Excellent avalanche
behavior, though, which is what you care about in a salted hash.
http://en.wikipedia.org/wiki/Hash_table

I know nothing about data structures and algorithms except what I read
on the Internet.  But you'd be amazed what's on the Internet.

Cheers,
- Michael
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