发明名称 |
Method and apparatus for securing electronic data |
摘要 |
The present invention relates to techniques for securing electronic data and keeping the electronic data secured at all times. According to one embodiment, a client module in a client machine is configured to provide access control to secured documents that may be located in a local store, another computer machine or somewhere over a data network. The client module includes a document-securing module configured to operate in a path through which a document being accessed is caused to pass so that the document can be examined or detected for the security nature. If the document is secured, the document-securing module obtains a user or group key to decrypt security information in the secured document for access rules therein. If a user accessing the document is determined to have the access privilege to the secured document, a file key is retrieved from the security information and a cipher module is activated to decrypt the encrypted data portion with the file key. Likewise, if a document is to be secured, the cipher module encrypts clear data from the document to create the encrypted data portion. The document-securing module integrates proper or desired security information with the encrypted data portion to produce the secured document. <IMAGE>
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申请公布号 |
EP1320013(A2) |
申请公布日期 |
2003.06.18 |
申请号 |
EP20020258533 |
申请日期 |
2002.12.11 |
申请人 |
PERVASIVE SECURITY SYSTEMS INC. |
发明人 |
LEE, CHANG-PING;GARCIA, DENIS JACQUES PAUL |
分类号 |
G06F21/00;H04L29/06;(IPC1-7):G06F1/00 |
主分类号 |
G06F21/00 |
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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