MEDIA SECURITY FOR IMS SESSIONS

IMS networks (100) and methods are disclosed for securing media streams for IMS sessions. A CSCF (102) of an EMS network (100) receives a registration message, such as a SIP Register message, from user equipment, UE, (111) of an INS subscriber indicating whether the UE (111) supports media security The CSCF (102) then forwards a registration message, such as a Diameter MAR, to a subscriber database (104) that includes a header parameter also indicating that the UE (111) supports media security. A media security system (106) generates media security information (e.g., algorithms, keys, etc), and the subscriber database (104) transmits a response message, such as a Diameter MAA, to the CSCF (102) that includes a header parameter for the media security information. The CSCF (102) transmits a response message, such as a SIP 200 OK message, to the UE (111) that includes a header parameter for the media security information. The UE (111) may use the media security information to secure media streams.