ThiS TS describes subscriber certificate distribution by means of generic bootstrapping architecture
(GBA) TS 33.220. Subscriber certificates support services whose provision the mobile operator assists, as well as
services that are offered by the mobile operator.
The scope of this specification presents signalling procedures for support of issuing certificates to subscribers and the
standard format of certificates and digital signatures. It is not intended to duplicate existing standards being developed
by other groups on these topics, and will reference these where appropriate.