MANAGEMENT OF AUTHENTICATION AND ENCRYPTION USER INFORMATION IN DIGITAL USER TERMINALS

摘要

The present invention provides methods and devices for controlling the authentication and ciphering procedures in digital communication devices. In the invention, a means for transmitting and receiving radio signals is connected with a processing unit. A. SIM is provided that contains authentication and ciphering information and is also connected with the processing unit. A memory module is provided that has a first memory location reserved for a authentication flag and a second memory location reserved for a ciphering flag. During operation, an authentication indicator is activated only when the communication device is authenticated during a system access. In addition, a ciphering indicator is activated when the communication device is encrypting data being sent and received from the digital wireless network.