Secure method of termination of service notification

A method for notifying a wireless client device of termination of at least one service provided to the client device by a server system through a wireless network, the server system being disposed within an enterprise network having access to the wireless network, the server system having stored thereon notification data and the wireless client device having stored thereon authentication data, wherein the authentication data is related to the notification data, wherein said notification data includes a termination of service packet, and wherein said authentication data includes one or more termination of service packets to be compared to said notification data, and wherein the server system stores an encryption key associated with the wireless client device for encrypted communications for said at least one service, the method comprising:

• determining, at the server system, that the encryption key is expired and that no other unexpired encryption keys are presently available in association with the wireless client device;
• ceasing to provide the at least one service to the wireless client device;
• and
• in response to determining that the encryption key is expired, transmitting said notification data to the wireless client device to notify the wireless client device that the at least one service has been terminated,
• wherein said client device may authenticate said notification data received from the server system on the basis of the stored authentication data and the relationship between the notification data and the authentication data.