发明名称 |
STORAGE PROTECTION UTILIZING PUBLIC KEY CONTROL |
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 a 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 intermediate 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.
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申请公布号 |
CA2064640(C) |
申请公布日期 |
1995.12.12 |
申请号 |
CA19922064640 |
申请日期 |
1992.04.01 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
CLARK, CARL E.;MALL, MICHAEL G.;SCALZI, CASPER A.;SINHA, BHASKAR |
分类号 |
G06F12/14;G06F21/24;(IPC1-7):G06F12/14;G06F13/16 |
主分类号 |
G06F12/14 |
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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