发明名称 |
Microprocessor with single pin for memory wipe |
摘要 |
A nonvolatile microcontroller (or microprocessor) with improved security against tampering, including attempts at active intrusion. According to this invention, a battery-backed microcontroller includes encryption and power management functions, and is combined with a battery and a volatile semiconductor memory (e.g. an SRAM). The microcontroller supplies power to the semiconductor memory (either from a system power supply or from the battery). When a security violation is detected, the microcontroller wipes its encryption registers, and also grounds the power-output pin to the memory. This will destroy all data in the volatile memory.
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申请公布号 |
US5515540(A) |
申请公布日期 |
1996.05.07 |
申请号 |
US19930174584 |
申请日期 |
1993.12.28 |
申请人 |
DALLAS SEMICONDUCTER CORP. |
发明人 |
GRIDER, STEPHEN N.;LITTLE, WENDELL L.;BOLAN, MICHAEL L. |
分类号 |
G06F21/00;(IPC1-7):G06F1/24;H04L9/00 |
主分类号 |
G06F21/00 |
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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