Simon Josefsson <[email protected]> writes:

> and the link for "algorithm specification" is
>
> http://www.cl.cam.ac.uk/~rja14/Papers/serpent.pdf

I think this is the authoritative spec, and same document which was
included in the submission package (floppy5/serpent.pdf).

>    The user key length is variable, but for the purposes of this
>    submission we fix it at 128, 192 or 256 bits
>
> That is a bit vague, either it is variable or it isn't.

I agree, this is not as definitive as I remembered it. Anyway, it
defines how short keys of any bitsize <= 256 bits should be padded, in
case anybody ever wants to use it, and gives 40-bit keys as an example.

> The Serpent-0 specification says
>
>    The user key can be of any length between 64 and 256 bits.[5]
>
>    [5] We define key lengths to be multiples of 32 bits for ease of
>    implementation, and ...

I don't think this is relevant.

Regards,
/Niels

-- 
Niels Möller. PGP-encrypted email is preferred. Keyid C0B98E26.
Internet email is subject to wholesale government surveillance.
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