Patent ID: 7890084

Claim:
A mobile communication network, comprising: a wireless data network; and an enterprise instant messaging (IM) service aggregator, the aggregator comprising: at least one enterprise gateway aggregating secure connections to and from secure links coupled to IM servers of a plurality of enterprise communities, for enterprises subscribing to mobile IM service through the communication network; at least one mobile station gateway coupled to the wireless data network of the communication network serving a plurality of mobile stations, the at least one mobile station gateway aggregating sessions for mobile stations of users affiliated with the enterprise communities; and a service control connected to the enterprise and mobile gateways to control IM sessions between mobile stations and the IM servers of the enterprise communities through the mobile communication network, wherein the service control is configured to: validate authorization of one mobile station attempting to access enterprise IM service of the mobile communication network; for the validly authorized one mobile station, encrypt login information of a user of the authorized mobile station and forward the encrypted login information to an identified one of the IM servers for enterprise validation of user authentication for access to the identified IM server; responsive to the user of the one mobile station being successfully validated by the identified IM server, provide a key of the aggregator to the one mobile station for use in communication of a security key of the one mobile station to the identified IM server, the security key of the one mobile station being for use in encrypted communications of one or more IM messages at least through the mobile communication network between the one mobile station and the identified IM server; and receive a message from an IM server of one of the enterprises indicating that service to an identified mobile station should be terminated, and in response, transmit an instruction through the wireless data network to the identified mobile station instructing the identified mobile station to remove all IM messages and/or enterprise IM credentials from the identified mobile station.