Patent ID: 8837489
Filing Date: 2014-09-16
Classification: H04L

Abstract:
1. A method of establishing a secure connection across a data network, the secure connection having a first endpoint at an egress port of a first multiservice switch (MSS) and a second endpoint at an ingress port of a second MSS, the method comprising: receiving, at the second MSS, a setup message including an embedded security data value; determining, based on a call scenario, an anticipated security data value, wherein the anticipated security data value indicates an embedded security data value expected to be included in the setup message for the setup message to pass a security check, wherein the anticipated security value is determined from a membership of a calling user and a destination user wherein at least one of the embedded security data value and the anticipated security data value are a closed user group interlock code; determining whether the embedded security data value matches the anticipated security data value; and if the embedded security data value matches the anticipated security data value, determining that the setup message passes the security check.