Hi all,

Just a technical question, not very IPSec-specific:   

Do the Brainpool curves comply with all the requirements (and ideally the 
recommendations too) that the ECDSA standards place on the elliptic curves?  
The intent of the ECDSA standards and IPSec is to have a secure, interoperable 
signature algorithm, which ought to be the case for the Brainpool curves used 
with ECDSA.  So IPSec may choose to call various things "ECDSA", but IPSec may 
want to avoid saying something is ANSI X9.62-2005 unless if it is strictly 
compliant.  

The main ECDSA standards are ANSI X9.62-2005 and SEC1-v2.0 (which also 
specifies other ECC algorithms and syntax).  FIPS 186-3 specifies ECDSA mostly 
by reference to ANSI X9.62-2005.   ISO also specifies "EC-DSA".  IEEE 1363-2000 
and IEEE 1363a-2004 specify ECDSA under a slightly different acronym.

As editor of ANSI X9.62-2005 and SEC1-v2.0, I ought able to help check 
compliance.  As I recall, both standards impose requirements on the elliptic 
curves in order to avoid weak curves, and perhaps also to encourage 
interoperability.  Maybe Johannes could contact me off-list to start this 
process.

Best regards,

Daniel Brown
Research In Motion Limited


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