Patent ID: 9706396
Date: 2017-07-11
CPC Classifications: H04L,H04W

Claim:
1. A method for providing data encryption in a device-to-device (D2D) group communication, the method comprising: creating, by a user equipment (UE), a new packet data convergence protocol (PDCP) entity for a service group wherein a service group is identified by a destination identifier (ID); determining if any PDCP entity of the service group exists or not; generating a new ProSe traffic key (PTK) from a ProSe group key (PGK) corresponding to the service group associated with the new PDCP entity; initializing a new packet counter associated with the service group to zero if the new PDCP entity is a first PDCP entity associated with the service group; generating a ProSe encryption key (PEK) from the PTK; and encrypting data packets mapped to the new PDCP entity using the PEK and a packet counter associated with the service group.