[messaging] Padding

[Michael Rogers]

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On 26/06/14 19:57, Michael Rogers wrote:
> It seems to me that the information leak depends on the observer's 
> prior knowledge about possible message sizes. For example, if the 
> observer knows that the message is either "Yes" or "No" then
> padding to the next power of two does nothing to conceal the
> message size (which in turn reveals the content).

Sorry for the self-reply. Putting it in these terms made me wonder
whether we should aim to minimise the mutual information between the
input and output distributions.

Cheers,
Michael
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