Messages in this thread | | | Date | Fri, 15 Aug 2003 18:09:07 +1000 | From | Nick Piggin <> | Subject | Re: [RFC][PATCH] Make cryptoapi non-optional? |
| |
David S. Miller wrote:
>On Fri, 15 Aug 2003 09:30:03 +0200 >Andries Brouwer <aebr@win.tue.nl> wrote: > > >>On Thu, Aug 14, 2003 at 06:17:13PM -0600, Val Henson wrote: >> >> >>>entropy(x) >= entropy(x xor y) >>>entropy(y) >= entropy(x xor y) >>> >>Is this trolling? Are you serious? >> > >These lemma are absolutely true. XOR is the worst way >to gain entropy because it means that if you are able >to know anything about either 'x' or 'y' then you are >able to know something about the resulting entropy. >
_Either_ x or y? Surely not! 1 ^ ? = ? you still have 1 bit of entropy.
- 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/
| |