Telecommunications device security

摘要

A terminal 1 for use with a cellular or mobile telecommunications network 3 includes authentication means 15 such as a SIM, USIM, UICC etc. for authenticating the terminal with the network. The terminal further includes a normal execution environment 30 and a secure execution environment 34. An interface controller 46 is provided in the secure execution environment and intercepts all communications directed to the authentication means to control access to the authentication means by these communications.