On Mon, Nov 06, 2006, Clem Taylor wrote:

> >It might be the 2048 bit DSA cert it doesn't like. Try with a 1024 bit DSA 
> >key
> >or a 2048 bit RSA key.
> 
> Yup, that seems to be the problem, it didn't like 2048 bit DSA keys.
> It is happy with 1024 bit DSA keys and 2048 bit RSA keys.
> 

Some standard revisions require the key size for DSA to be between 512 and
1024 bits in one case and only 1024 bits in another. 

> I'm creating the certs for an embedded security device that could
> easily have a >15 year life and typically won't have an internet
> connection, so I want to make sure that I'm using enough bits to cover
> the life of the device. I guess I'll go with 2048 bit RSA keys.
> 

That would arguably put the use of SHA-1 into question too. Though if you use
SHA-2 not all software will support it.

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
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