| 摘要 |
The telecommunication system includes an authentication provider (4) belonging to a mobile network to authenticate an user towards a service provider. An authentication broker (2) belonging to another mobile network that acts as entry point to a federation of mobile network operators (MNO) related to service providers respectively having entry point agreements with an operator of the federation entry point mobile network. : Independent claims are also included for the following: (1) method for providing single sign-on services; (2) authentication broker; and (3) authentication provider.
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