Messages in this thread | | | Date | Fri, 15 Aug 2003 10:03:24 -0500 | From | Matt Mackall <> | Subject | Re: [RFC][PATCH] Make cryptoapi non-optional? |
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On Fri, Aug 15, 2003 at 09:30:03AM +0200, Andries Brouwer wrote: > On Thu, Aug 14, 2003 at 06:17:13PM -0600, Val Henson wrote: > > > See Matt Mackall's earlier post on correlation, excerpted at the end > > of this message. Basically, with two strings x and y, the entropy of > > x alone or y alone is always greater than or equal to the entropy of x > > xored with y. > > > > entropy(x) >= entropy(x xor y) > > entropy(y) >= entropy(x xor y) > > Is this trolling? Are you serious? > Try to put z = x xor y and apply your insight to the strings x and z.
Val left out the assumption that x and y are already perfectly distributed, in and of themselves.
-- Matt Mackall : http://www.selenic.com : of or relating to the moon - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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