Patent ID: 9015488
Filing Date: 2015-04-21
Classification: H04L

Abstract:
1. A method of communicating a communication fragment, the communication fragment comprising a first target address reference identifying a group of target devices including at least one receiver device, the method comprising acts of: a sender device adding a cryptographic message integrity code to protect at least part of the communication fragment including the first target address resulting in a protected communication fragment, the sender device transmitting the protected communication fragment to a router device, the router device, for the at least one receiver device in the group of target devices, modifying the first target address reference into an address reference of the at least one receiver device, while maintaining the cryptographic message integrity code unchanged resulting in a modified protected communication fragment, and subsequently forwarding the modified protected communication fragment to the at least one receiver device, the at least one receiver device receiving the modified protected communication fragment, and the at least one receiver device restoring the protected communication fragment including substituting the first target address for the address reference of the at least one receiver device to allow verification of the protected communication fragment using the cryptographic message integrity code.