发明名称 |
Data protection system, method, and program |
摘要 |
The data dividing unit divides data into n pieces. An encoding unit generates m pieces of encoded data composed of a set of a bitmap matrix specifying a plurality pieces of divided data for obtaining exclusive OR (XOR) and exclusive OR data including exclusive OR of the plurality pieces of divided data specified by the bitmap matrix, wherein m is equal to or more than a dividing number n and according to redundancy. A distributed saving unit distributes and saves the m pieces of encoded data to and in storage devices at two or more locations and m or less locations. A decoding unit restores the original data by retrieving restorable k or more pieces of the encoded data among the distributed and saved m pieces of encoded data and subjecting the bitmap matrix of the retrieved encoded data to conversion into a unit matrix.
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申请公布号 |
US2007253548(A1) |
申请公布日期 |
2007.11.01 |
申请号 |
US20060512336 |
申请日期 |
2006.08.30 |
申请人 |
FUJITSU LIMITED |
发明人 |
KAMEYAMA HIROAKI;SATOU YUICHI;SAZAWA SHINICHI |
分类号 |
H04L9/28;G06F11/30;G06F12/14;H04K1/00;H04K1/04;H04K1/06;H04L9/00;H04L9/32 |
主分类号 |
H04L9/28 |
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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