发明名称 |
Method and apparatus for erasing data after expiration |
摘要 |
An approach for storing and maintaining data involves determining whether data has been stored on a first non-volatile storage for a specified period of time. If so, then the data on the first non-volatile storage is deleted by overwriting the data on the first non-volatile storage with a predetermined value so that the data cannot be recovered. The first non-volatile storage is registered with a registration authority to provide authentication of the data maintained on the first non-volatile storage. A duplicate copy of the data is stored on a second non-volatile storage and if a determination is made that the data has been stored on a first non-volatile storage for a specified period of time, then the duplicate copy of the data is deleted by overwriting the duplicate copy of the data on the second non-volatile storage with the predetermined value.
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申请公布号 |
US6304948(B1) |
申请公布日期 |
2001.10.16 |
申请号 |
US19980167628 |
申请日期 |
1998.10.06 |
申请人 |
RICOH CORPORATION;RICOH COMPANY LTD |
发明人 |
MOTOYAMA TETSURO;YACHIDA MASUYOSHI |
分类号 |
G06F12/14;G06F3/06;G06F21/00;G06F21/24;G11C29/00;(IPC1-7):G06F12/00 |
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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