发明名称 |
Electronic apparatus comprising a memory protection device and method of protecting data in a memory |
摘要 |
An electronic apparatus has a protection device which includes a random number generator for producing a random number unique to the electronic apparatus. The random number is stored as a personality data in a memory when the electronic apparatus is switched on for the first time. Subsequently, a comparator compares the random number with the personality data stored in the memory and prevents operation of the electronic apparatus device and/or memory access when the comparison result indicates that the random number and personality data are different. The random number generator is formed by a voltage divider of resistors having large tolerances and/or being chosen randomly, where the voltage divider output is converted to a digital value.
|
申请公布号 |
US6732274(B1) |
申请公布日期 |
2004.05.04 |
申请号 |
US19980207532 |
申请日期 |
1998.12.08 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
CHARRON DIDIER |
分类号 |
G06F7/58;G06F12/14;G06F21/00;G06F21/24;H04L9/10;H04L9/32;H04Q7/38;(IPC1-7):H04L9/00;G06F11/30 |
主分类号 |
G06F7/58 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|