Thanks Salz for the reply. I do understand the server key exchange is used to involve even the server in the key exchange process to send the ECDHE public key with the EC domain parameters so that the client creates the ECDHE public key and the pre master secret. But even if there is no server key exchange , what is the impact on the secure system? and what impact does it show when used? Regards, Suman -- View this message in context: http://openssl.6102.n7.nabble.com/server-key-exchange-use-case-in-ECDSA-ECDHE-AES-SHA-tp67596p67620.html Sent from the OpenSSL - User mailing list archive at Nabble.com.