Re: Entropy from net devices - keyboard & IDE just as 'bad' [was Re: [PATCH] let Net Devices feed Entropy, updated (1/2)]

From: Robert Love (rml@tech9.net)
Date: Tue Aug 21 2001 - 16:57:15 EST


On Tue, 2001-08-21 at 17:50, Robert Love wrote:
><snip>
>
> In theory, we dont need both SHA-1 hash and the entropy count. They
> exist to pacify a theoretical weakness in each.
>
> Now, my net device patch should only be enabled in situations where both
> you trust SHA-1 (and I think most do) and you trust that reading net
> devices yields the full amount of entropy.

'lil typo on my part. actually, if you trust SHA-1, it does not matter
if your net devices give zero entropy, because the SHA-1 hash of the
read from /dev/random is still unpredictable.

the problem is if you both _dont_ trust SHA-1 and _fear_ there is
less-than-estimated entropy from net devices on your network.

per Alex Bligh's suggestion, the Configure wording of the next patch
will explain this.
 

-- 
Robert M. Love
rml at ufl.edu
rml at tech9.net

- 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/



This archive was generated by hypermail 2b29 : Thu Aug 23 2001 - 21:00:46 EST