发明名称 |
Cellular phone semi-secure clock method and apparatus |
摘要 |
A method of providing a secure clock in a communication device in contact with a communication system includes detecting a clock event whenever a clock event occurs; initializing a secure clock and setting a secure clock flag to TRUE; and setting the secure clock to a secure clock time. A secure clock mechanism for use in a communication device which is in contact with a communication system includes real-time clock hardware; programmable memory and non-volatile memory; and a back-up battery for powering the secure clock mechanism; a clock event detection mechanism for detecting clock events, which are taken from a group of clock events consisting of user clock events and system clock events; a secure clock initializing mechanism for setting the secure clock and for setting a secure clock flag to TRUE; and a secure clock setting mechainism for setting the secure clock to a secure clock time.
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申请公布号 |
US2005181761(A1) |
申请公布日期 |
2005.08.18 |
申请号 |
US20040778566 |
申请日期 |
2004.02.12 |
申请人 |
SHARP LABORATORIES OF AMERICA, INC. |
发明人 |
PARK KENNETH J. |
分类号 |
G04G5/00;G06F1/14;H04M1/68;H04M1/725;H04Q7/38;(IPC1-7):H04M1/68 |
主分类号 |
G04G5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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