公开(公告)号：CA2064640A1

公开(公告)日：1992-12-07

申请号：CA2064640

申请日：1992-04-01

Applicant: IBM

Inventor： CLARK CARL E ,  MALL MICHAEL G ,  SCALZI CASPER A ,  SINHA BHASKAR

IPC: G06F12/14 ,  G06F21/24 ,  G06F13/16

Abstract: Provides three access levels of storage key protection, comprising a supervisory level (key 0), an intermediate level of non-public and non-supervisory keys (keys 1-8, 10-15), and an unique public level (key 9). The program routines operating with a supervisory-level access key can access both the public level and the intermediate level of storage blocks. Although a program routine operating with an access key in the intermediary access level cannot access any supervisory level storage block, it can access any block assigned a public level storage key, as well as any storage block assigned the respective intermediate level key. One or more third-level public storage keys (PSKs) may be provided. A program access key using one of the PSK values can only access blocks having the same PSK value, and it cannot access blocks having any other key value.

公开(公告)号：BR8900553A

公开(公告)日：1989-10-10

申请号：BR8900553

申请日：1989-02-09

Applicant: IBM

Inventor： BAUM RICHARD IRWIN ,  BORDEN TERRY L ,  BUTWELL JUSTIN R ,  CLARK CARL E ,  GARNEK ALAN G ,  LUM JAMES ,  MALL MICHAEL G ,  PLAMBECK KENNETH E ,  SCALZI CASPER A

IPC: G06F12/08 ,  G06F9/46 ,  G06F12/02 ,  G06F12/10 ,  G06F12/1036 ,  G06F12/14 ,  G06F9/00