Security is not a major concern anymore, since critical data is stored on servers in highly secured data centers. The mobile devices are used as terminals for information access and updates only. TLS (see IETF RFC 5246) and its predecessor SSL (see IETF RFC 6101) security protocol is deployed between the web server and the web browser on the end user device. Lost devices is not a problem since both the data and the programs reside on the servers housed in the data centers and not on the mobile devices.