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

The is claimed and radio broadcasting of the multimedia system (MBMS) and fuse for registering method and a device. Playing broadcast-multicast services body (BM-SC) is a random number, playing to user equipment in a wireless access network (RAN) cover area. Memory module or an intelligent card (a) UICC user device for generating wireless access network key (RAK), which is connected to the number and from a function of key of running mobile network key (PK) and a group of broadcasting access key and selects, and generating provisional registration key; the provisional registration key is arranged RAK and service identification number and user identity value (e.g. P-TMSI) is function, RAN of withdraw, wherein the aim of with the register authentication of the legitimate registration.