Re: A Question of Permutations of Vectors of Bits
From: Mok-Kong Shen (mok-kong.shen_at_t-online.de)
Date: 07/31/03
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Date: Thu, 31 Jul 2003 17:26:08 +0200
Simon G Best wrote:
>
[snip]
> Despite that, you have subsequently ignored what I'd said, and are now
> telling me that I should say, "P is a block encryption function or P is
> a bijective mapping of the space of n-bit entities to itself," as if I
> hadn't already said it several posts ago!
Here a few quotations from you:
No, I didn't "'change'" the problem. I just realised
that I hadn't worded it very well.
P doesn't necessarily transpose the bits within each vector.
For example, P could be such that P(00000000) = 01101011.
Calling such a 'permutation' is very much more than not
having worded it very well in my view.
M. K. Shen
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