Secure time functionality for a wireless device

摘要

The present invention is related to a wireless transmit/receive unit (WTRU) for providing advanced security functions. The WTRU includes trusted platform module (TPM) for performing trusted computing operations; and a secure time component (STC) for providing a secure measurement of a current time. The STC and the TPM are integrated to provide accurate trusted time information to internal and external to the WTRU. The STC may be located on an expanded a subscriber identity module (SIM), on the WTRU platform, or two STCs may be used, one in each location. Similarly, the TPM may be located on an expanded SIM, on the WTRU platform, or two TPMs may be used, one in each location. Preferably, the STC will include a real time clock (RTC); a tamper detection and power failure unit; and a time report and sync controller.

主权项

1. A wireless-communications device comprising:
a real time clock (RTC) for measuring a current time, wherein the wireless communications device is configured to re-synchronize the current time of the RTC with a secure time server to which the wireless communication device is coupled via a network; a time report and sync controller configured to control functions of the RTC; a trust platform module (TPM) comprising a memory protected by the TPM; and a power failure unit configured to detect a failure of power in the wireless communications device and to alert the TPM of the power failure, wherein the wireless communications device is further configured to securely store time related information from the RTC in the memory protected by the TPM upon detection of the failure of power by the power failure unit.