发明申请
- 专利标题： SYSTEM AND METHOD FOR PROTECTING AN ELECTRONIC FILE
- 专利标题（中）： 用于保护电子文件的系统和方法
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申请号： US12325277申请日： 2008-12-01
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公开(公告)号： US20090158037A1公开(公告)日： 2009-06-18
- 发明人: CHUNG-I LEE , HAI-HONG LIN , DE-YI XIE , CHEN-CHEN ZHANG
- 申请人： CHUNG-I LEE , HAI-HONG LIN , DE-YI XIE , CHEN-CHEN ZHANG
- 申请人地址： CN Shenzhen TW Tu-Cheng
- 专利权人： HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD,HON HAI PRECISION INDUSTRY CO., LTD.
- 当前专利权人： HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD,HON HAI PRECISION INDUSTRY CO., LTD.
- 当前专利权人地址： CN Shenzhen TW Tu-Cheng
- 优先权： CN200710203063.7 20071214
- 主分类号： H04L9/00
- IPC分类号： H04L9/00 ; H04L9/08
摘要：
A method for protecting an electronic file is provided. The method symmetrically encrypts the electronic file with a symmetric key, and asymmetrically encrypts the symmetric key. In addition, the method calculates a message digest for the encrypted electronic file, and obtains a trusted timestamp for the message digest. The method may provide security and authenticity for the electronic file.
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