Decrypting TLS traffic with EDH key exchange If I have a packet sniffer on my network seeing traffic that is being mirrored off of a switch span port and that sniffer has my keys and sees all of the packets between the client and my server and that traffic was using an EDH based cipher, is it possible to decrypt the traffic? 

On one hand I think I understand forward secrecy and all of that but on the other hand, the sniffer has the key and sees all of the negotiation so I would imagine it sees the master secret also, right?