On 15/05/12 20:21, Fábio Resner wrote:
I don`t know if this is the correct place to make this conceptual
question but here it goes:
In DH you must exchange the parameters in order to generate the keys
for the algorithm to work properly. (Am I wrong?)
But in ECDH (accordingly to the code above) I only needed to exchange
the public keys without
exchanging any parameters for key's generation.
Is this particular for ECDH or are the parameter exchange being hidden
for the library?
In the example code you are using a named curve. This is a standardised
curve (along with associated standardised parameters) which is built in
to the library. The fact that both ends of the communication have agreed
to use the same named curve is where your parameter exchange is taking
place.
Matt
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