This paper presents an architecture for resource sharing in Personal Networks (PNs). Resources are not necessarily in the same authentication domain and the group that uses them is called a federation. The architecture is based on two components: A signaling protocol and a group key management system. Federation architecture, different interactions with the protocols and an efficient group key algorithm are explained in this work. The performance evaluation of different procedures has concluded and presented. Keywords-component; personal networks; PN federations; access contro; group key management