Secure registration for a multicast-broadcast-multimedia system (MBMS)

A method of obtaining secure registration by a mobile station in a multicast-broadcast-multimedia system (MBMS), the method comprising:

• receiving a random number from a radio access network;
• transmitting the random number to a memory module (UICC);
• receiving from the UICC a temporary registration key (RGK) based on the random number and a user identification number;
• and
• authenticating at least one registration message in the MBMS based on the RGK, wherein the RGK is a function of a radio access network key (RAK), a service identification number and a user identification number, and wherein the RAK is a function of the random number and a key selected from the group consisting of a public land mobile network key (PK) and a broadcast access key (BAK).

A memory module stored on a computer readable storage medium, comprising:

• receiving logic configured for receiving a random number;
• means for generating a radio access network key (RAK) as a function of the random number and a key selected from the group consisting of a public land mobile network key (PK) and a broadcast access key (BAK);
• means for generating a temporary registration key (RGK) as a function of the RAK and a user identification number;
• and
• means for authenticating at least one registration message in the MBMS based on the RGK, wherein the RGK is a function of the RGK, service identification number and the user identification number.

A mobile station apparatus, comprising:

• receiving logic configured for receiving a random number from a radio access network;
• means for transmitting the random number to a memory module (UICC);
• means for receiving from the UICC a temporary registration key (RGK) based on the random number and a user identification number;
• and
• means for authenticating at least one registration message in the MBMS based on the RGK, wherein the RGK is a function of a radio access network key (RAK), a service identification number and a user identification number, and wherein the RAK is a function of the random number and a key selected from the group consisting of a public land mobile network key (PK) and a broadcast access key (BAK).

A computer readable storage medium storing instructions for obtaining secure registration by a memory module (UICC) in a multicast-broadcast-multimedia system (MBMS), the method comprising:

• receiving a random number;
• generating a radio access network key (RAK) as a function of the random number and a key selected from the group consisting of a public land mobile network key (PK) and a broadcast access key (BAK);
• generating a temporary registration key (RGK) as a function of the RAK and a user identification number;
• and
• authenticating at least one registration message in the MBMS based on the RGK, wherein the RGK is a function of the RAK, a service identification number and a user identification number.

A computer readable storage device storing instructions for obtaining secure registration by a mobile station in a multicast-broadcast-multimedia system (MBMS), the method comprising:

• receiving a random number from a radio access network;
• transmitting the random number to a memory module (UICC);
• receiving from the UICC a temporary registration key (RGK) based on the random number and a user identification number;
• and
• authenticating at least one registration message in the MBMS based on the RGK, wherein the RGK is a function of a radio access network key (RAK), a service identification number and a user identification number, and wherein the RAK is a function of the random number and a key selected from the group consisting of a public land mobile network key (PK) and a broadcast access key (BAK).