Embodiments are directed to sharing secure communication secrets with a network monitoring device (NMD). The NMD may passively monitor network packets communicated between client computers and server computers. If a secure communication session is established between a client computer and a server computer, a key provider may provide the NMD a session key that corresponds to the secure communication session. The NMD may buffer each network packet associated with the secure communication session until the NMD is provided a session key for the secure communication session. The NMD may use the session key to decrypt network packets communicated between the client computer and the server computer. The NMD may then proceed to analyze the secure communication session based on the contents of the decrypted network packets.