发明名称 |
Device and method for checking the user authorization of an access control system,in particular locking device for vehicles |
摘要 |
<p>The device has a controller (A) with a stored code on the access side, a user key (B) containing a transponder (T) and a comparator (V) in the controller which determines validity for releasing the access device by comparing the information transmitted by the transponder with information in the controller. The controller stores a secret key and a user code which are placed in the key transponder. The information transmitted by the transponder consists of the user code encoded with the secret key. The key contains a comparator coupled with lock bits for the secret key so that a partial release is effected to enable overwriting of the secret key stored in the key, if the further comparator detects coincidence between the transmitted user code and a stored user code.</p> |
申请公布号 |
EP0811739(B1) |
申请公布日期 |
2004.03.31 |
申请号 |
EP19970108985 |
申请日期 |
1997.06.04 |
申请人 |
DELPHI AUTOMOTIVE SYSTEMS DEUTSCHLAND GMBH |
发明人 |
KONRAD, REIMUND;PETSCHING, WILFRIED;WEISS, BERND |
分类号 |
B60R25/24;G07C9/00;(IPC1-7):E05B49/00;B60R25/04 |
主分类号 |
B60R25/24 |
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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