RSA key size restriction?

[torduninja at netcourrier.com]

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David Shaw wrote:

>> 
>> Thanks, David. That should be good enough for those of us who want to
>> generate oversize keys for some reason.
>> 
>> Actually, I agree with the criticism of these large keys, but I have
a 
>> correspondent who refuses all encrypted communication with keys 
>> smaller than 7680 bits. Paranoia or eccentricity - I'm not sure. I 
>> have a large RSA v4 key created with a hacked PGP version, but I'm
not 
>> happy with it because it has a v3 signature on the subkey, which 
>> doesn't seem too reglo for my taste.

> 
> V3 subkey signatures are legal, but certainly a bit odd.
> 
> Out of curiosity, do you know how or why your correspondent came up
> with 7680 bits in particular?
>
His explanation was that if 128-bit level of encryption is permitted by
governments it can't be secure but a 192-bit level should still be safe,
and
according to a certain table of equivalences the equivalent is a
7680-bit RSA 
key.

Anyway, I've recompiled GnuPG and made a more conventional large key to
keep him happy.

Salut,
Maxine


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