combining entropy

John Denker jsd at
Fri Oct 24 08:29:36 EDT 2008

On 09/29/2008 05:13 AM, IanG wrote:
> My assumptions are:
>  * I trust no single source of Random Numbers.
>  * I trust at least one source of all the sources.
>  * no particular difficulty with lossy combination.

> If I have N pools of entropy (all same size X) and I pool them
> together with XOR, is that as good as it gets?


The second assumption suffices to prove the result,
since (random bit) XOR (anything) is random.

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