Patent ID: 9628271
Date: 2017-04-18
CPC Classifications: H04L

Claim:
1. A method for establishing secure communication between communication devices in a communications network, the method comprising: a first communication device transmitting a request to a first key management server (KMS) apparatus, wherein the first KMS apparatus is configured such that, in response to the request, the first KMS apparatus transmits keying information and a voucher comprising information for retrieving the keying infoithation from the first KMS apparatus; the first communication device receiving the keying information and voucher transmitted by the first KMS apparatus; and after receiving the transmitted keying information and voucher, transmitting, by the first communication device, a session invitation message for creating a session with a second communication device, the session invitation message comprises the voucher, and the second communication device is separate and distinct from the first KMS apparatus.