公开(公告)号：DE69028226D1

公开(公告)日：1996-10-02

申请号：DE69028226

申请日：1990-02-06

Applicant: IBM

Inventor： ENESCU MICHAEL ALEXANDER ,  LUM JAMES

IPC: G06F21/20 ,  G06F1/00 ,  G06F12/14 ,  G06F21/00 ,  G06F21/22

Abstract: 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.

公开(公告)号：DE69028226T2

公开(公告)日：1997-03-13

申请号：DE69028226

申请日：1990-02-06

Applicant: IBM

Inventor： ENESCU MICHAEL ALEXANDER ,  LUM JAMES

IPC: G06F21/20 ,  G06F1/00 ,  G06F12/14 ,  G06F21/00 ,  G06F21/22

Abstract: 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.