On Friday, July 12, 2013 11:33:13 AM UTC-4, Stefan Birgmeier wrote:
>
> Hello,
> In my application i generate an ECIES private/public key pair. Then i use 
> the private exponent and the public key point to initialize an ECDSA key 
> pair.

Yes, you should validate at level 3 once loaded. Even though ECIES and 
ECDSA both use elliptic curves, there could be minor differences in the key 
requirements so they might not be interchangeable.
 

> Do i need to run validate() on the ECDSA key pair if i already validated 
> the ECIES key pair?
>
Yes, but you only need to do it once upon loading.

Also see http://www.cryptopp.com/wiki/Keys_and_formats and 
http://www.cryptopp.com/wiki/Ecdsa.

Jeff 

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