Emmanuel Fleury wrote:
> 
> Just to be sure, could you briefly try all the combinations between the
> four firmwares we got (it's 12 combination), extract the entropy number

Damn, I lost my C_n,p. It's not 12 but 5 for osos, 5 for aupd.

entropy(osos_v19.1.1.0 xor osos_v19.1.1.1)    = ?
entropy(osos_v19.1.1.0 xor osos_v19.1.1.1bis) = ?
entropy(osos_v19.1.1.0 xor osos_v19.1.1.2)    = ?
entropy(osos_v19.1.1.1 xor osos_v19.1.1.1bis) = ?
entropy(osos_v19.1.1.1 xor osos_v19.1.1.2)    = ?

entropy(aupd_v19.1.1.0 xor aupd_v19.1.1.1)    = ?
entropy(aupd_v19.1.1.0 xor aupd_v19.1.1.1bis) = ?
entropy(aupd_v19.1.1.0 xor aupd_v19.1.1.2)    = ?
entropy(aupd_v19.1.1.1 xor aupd_v19.1.1.1bis) = ?
entropy(aupd_v19.1.1.1 xor aupd_v19.1.1.2)    = ?

And then, you can try to mix a bit aupd and osos:

entropy(osos_v19.1.1.0 xor aupd_v19.1.1.0)       = ?
entropy(osos_v19.1.1.0 xor aupd_v19.1.1.1)       = ?
entropy(osos_v19.1.1.0 xor aupd_v19.1.1.1bis)    = ?
entropy(osos_v19.1.1.0 xor aupd_v19.1.1.2)       = ?
entropy(osos_v19.1.1.1 xor aupd_v19.1.1.0)       = ?
entropy(osos_v19.1.1.1 xor aupd_v19.1.1.1)       = ?
entropy(osos_v19.1.1.1 xor aupd_v19.1.1.1bis)    = ?
entropy(osos_v19.1.1.1 xor aupd_v19.1.1.2)       = ?
entropy(osos_v19.1.1.1bis xor aupd_v19.1.1.0)    = ?
entropy(osos_v19.1.1.1bis xor aupd_v19.1.1.1)    = ?
entropy(osos_v19.1.1.1bis xor aupd_v19.1.1.1bis) = ?
entropy(osos_v19.1.1.1bis xor aupd_v19.1.1.2)    = ?
entropy(osos_v19.1.1.2 xor aupd_v19.1.1.0)       = ?
entropy(osos_v19.1.1.2 xor aupd_v19.1.1.1)       = ?
entropy(osos_v19.1.1.2 xor aupd_v19.1.1.1bis)    = ?
entropy(osos_v19.1.1.2 xor aupd_v19.1.1.2)       = ?


PS: I "guessed" that osos is the kernel because of the heavy protection
around it and also because "OS = Operating System".
And then, I "guessed" that aupd is the software because I suspect aupd
to be a shortend for "AUdio iPoD [software]" (all the audio part of the
ipod). It makes sense, from a developer point of view, to separate the
operating system from the main application of an embedded device in
order to have two different teams working on each (plus some other
maintainability advantages).

That's all folks !
-- 
Emmanuel Fleury              | Office: 261
Associate Professor,         | Phone: +33 (0)5 40 00 69 34
LaBRI, Domaine Universitaire | Fax:   +33 (0)5 40 00 66 69
351, Cours de la Libération  | email: [EMAIL PROTECTED]
33405 Talence Cedex, France  | URL: http://www.labri.fr/~fleury

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