发明名称 |
METHOD AND DEVICE FOR PROTECTION OF AN MRAM DEVICE AGAINST TAMPERING |
摘要 |
Data, stored in MRAM-cells (12) should be protected against misuse or read-out by unauthorised persons. The present invention provides an array (10) of MRAM-cells (12) provided with a security device (14) for destroying data stored in the MRAM-cells (12) when they are tampered with. This is achieved by placing a permanent magnet (16) adjacent the MRAM-array (10) in combination with a soft-magnetic flux-closing layer (18). As long as the soft-magnetic layer (18) is present, the magnetic field lines (20) from the permanent magnet (16) are deviated and flow through this soft-magnetic layer (18). When somebody is tampering with the MRAM-array (10), e.g. by means of reverse engineering, and the flux-closing layer (18) is removed, the flux is no longer deviated and affects the nearby MRAM-array (10), thus destroying the data stored in the MRAM-cells (12). |
申请公布号 |
WO2004055824(A2) |
申请公布日期 |
2004.07.01 |
申请号 |
WO2003IB06005 |
申请日期 |
2003.12.15 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;LENSSEN, KARS-MICHIEL, H.;JOCHEMSEN, ROBERT |
发明人 |
LENSSEN, KARS-MICHIEL, H.;JOCHEMSEN, ROBERT |
分类号 |
G06F21/79;G06K19/073;G11C7/24;G11C8/20;G11C11/16;H01L23/58 |
主分类号 |
G06F21/79 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|