Method of encrypting/decrypting the document and a safety management storage device and system method of its safety management
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United States of America Patent
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Oct 23, 2012
Grant Date -
Sep 4, 2008
app pub date -
Sep 22, 2006
filing date -
Sep 22, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of encrypting/decrypting the document and a safety management storage device and system method of its safety management, using for the safety management of electronic documents, the said system comprising a PC or mainframe installed with common reading software and a storage device of safety management connected to the said PC/mainframe through hot-plug; when connected to the mainframe, the said storage device is enumerated as a USB CDROM device at least. The user owns the said storage device can encrypt the electronic documents by using the encryption keys to generate an encrypted document with the same file type, also can open the encrypted document by using common reading software, and then use the document according to the predetermined operation authority. By using present invention, the users and the range of using the documents will be limited through the control of the distribution of the said storage devices, thus, a document safety management system with high security and easy-use will be established, and with the advantage of easy control, low cost of investment and maintenance.
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