A mobile end-user device contains a device messaging agent that securely communicates with a network message server over a wireless network. The network message server delivers messages to the device messaging agent on behalf of a plurality of network application servers. Each network application server supplies the network message server with application data and an indication of a device and an application on the device to which the application data should be delivered. The network message server securely passes the data and an application identifier to the device messaging agent on the appropriate mobile end-user device. The device messaging agent maps the application identifier to a software process corresponding to the application, and a secure interprocess communication service delivers the application data to that software process.