发明授权
- 专利标题: Storage protection utilizing public storage key control
- 专利标题(中): 存储保护利用公共存储钥匙控制
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申请号: US710875申请日: 1991-06-06
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公开(公告)号: US5163096A公开(公告)日: 1992-11-10
- 发明人: Carl E. Clark , Michael G. Mall , Casper A. Scalzi , Bhaskar Sinha
- 申请人: Carl E. Clark , Michael G. Mall , Casper A. Scalzi , Bhaskar Sinha
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G06F12/14
- IPC分类号: G06F12/14 ; G06F21/24
摘要:
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/授权文献
- US5690047A Buoyant anchorage mechanism 公开/授权日:1997-11-25