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From: "George Spelvin" <linux@sciencehorizons.net>
To: herbert@gondor.apana.org.au, smueller@chronox.de, tytso@mit.edu
Cc: andi@firstfloor.org, cryptography@lakedaemon.net,
	hpa@linux.intel.com, joe@perches.com, jsd@av8n.com,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux@horizon.com, pavel@ucw.cz, sandyinchina@gmail.com
Subject: Re: [PATCH v4 0/5] /dev/random - a new approach
Date: 31 May 2016 18:34:46 -0400	[thread overview]
Message-ID: <20160531223446.718.qmail@ns.sciencehorizons.net> (raw)
In-Reply-To: <1668650.acZVSyjHlL@positron.chronox.de>

I'll be a while going through this.

I was thinking about our earlier discussion where I was hammering on
the point that compressing entropy too early is a mistake, and just
now realized that I should have given you credit for my recent 4.7-rc1
patch 2a18da7a.  The hash function ("good, fast AND cheap!") introduced
there exploits that point: using a larger hash state (and postponing
compression to the final size) dramatically reduces the requirements on
the hash mixing function.

I wasn't conscious of it at the time, but I just now realized that
explaining it clarified the point in my mind, which led to applying
the principle in other situations.

So thank you!

  parent reply	other threads:[~2016-05-31 22:34 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-31 18:37 [PATCH v4 0/5] /dev/random - a new approach Stephan Mueller
2016-05-31 18:37 ` [PATCH v4 1/5] crypto: DRBG - externalize DRBG functions for LRNG Stephan Mueller
2016-05-31 18:38 ` [PATCH v4 2/5] random: conditionally compile code depending on LRNG Stephan Mueller
2016-05-31 18:39 ` [PATCH v4 3/5] crypto: Linux Random Number Generator Stephan Mueller
2016-05-31 18:39 ` [PATCH v4 4/5] crypto: LRNG - enable compile Stephan Mueller
2016-05-31 18:39 ` [PATCH v4 5/5] random: add interrupt callback to VMBus IRQ handler Stephan Mueller
2016-05-31 22:34 ` George Spelvin [this message]
2016-06-15 16:17 ` [PATCH v4 0/5] /dev/random - a new approach David Jaša
2016-06-15 16:58   ` Stephan Mueller
2016-06-17 13:56     ` David Jaša
2016-06-17 15:26       ` Sandy Harris
2016-06-18  8:22         ` Stephan Mueller
2016-06-18  8:21       ` Stephan Mueller
2016-06-18 14:44       ` Theodore Ts'o
2016-06-18 16:31         ` Stephan Mueller
2016-06-20 17:07           ` Austin S. Hemmelgarn
2016-06-20 18:32             ` Stephan Mueller
2016-06-21 13:05               ` Austin S. Hemmelgarn
2016-06-21 13:19                 ` Tomas Mraz
2016-06-21 17:18                   ` Austin S. Hemmelgarn
2016-06-21 17:23                     ` Stephan Mueller
2016-06-21 17:54                       ` Austin S. Hemmelgarn
2016-06-21 18:05                         ` Stephan Mueller
2016-06-21 13:20                 ` Stephan Mueller
2016-06-21 17:51                   ` Austin S. Hemmelgarn
2016-06-21 18:04                     ` Stephan Mueller
2016-06-21 19:31                       ` Austin S. Hemmelgarn
2016-06-22  5:16                         ` Stephan Mueller
2016-06-22 12:54                           ` Austin S. Hemmelgarn
2016-06-22 13:25                             ` Stephan Mueller
2016-06-21 13:42                 ` Pavel Machek
2016-06-21 17:17                   ` Austin S. Hemmelgarn
2016-06-21 12:25         ` David Jaša

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