发明名称 |
Tamper resistant access authorising method. |
摘要 |
<p>A tamper-resistant facility is disclosed for controlling the number of users given authorised access to licensed software in a host-based, multiple terminal system by use of an encrypted authorisation list depth parameter. The facility can be embedded in the host-licensed software and can decrypt the depth parameter only using a key derived from its own CPU ID and an offset.</p> |
申请公布号 |
EP0384610(A2) |
申请公布日期 |
1990.08.29 |
申请号 |
EP19900301253 |
申请日期 |
1990.02.06 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ENESCU, MICHAEL ALEXANDER;LUM, JAMES |
分类号 |
G06F21/22;G06F21/20;G06F1/00;G06F12/14;G06F21/00 |
主分类号 |
G06F21/22 |
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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