发明名称 |
Protected computer disc allowing information to be destroyed after certain time lapse |
摘要 |
The three and a half inch disc has the usual cover with read access slot (5) and a dedicated smart chip (6) on its outer surface. The chip contains encoding data for accessing data on the disc. The chip may also be a single chip microcomputer. The encoding mechanism may be used for copy protection, limiting the number of copies made, or applying other constraints.
|
申请公布号 |
DE4403206(A1) |
申请公布日期 |
1995.08.10 |
申请号 |
DE19944403206 |
申请日期 |
1994.02.03 |
申请人 |
WALDORF, RALPH, 78333 STOCKACH, DE |
发明人 |
WALDORF, RALPH, 78333 STOCKACH, DE |
分类号 |
G06K19/077;G11B20/00;G11B23/03;(IPC1-7):G11B23/30 |
主分类号 |
G06K19/077 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|