System and method for imposing security on copies of secured items
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 8, 2009
Grant Date -
Nov 20, 2003
app pub date -
May 14, 2002
filing date -
May 14, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Improved approaches for securing files that are derived from secured files are disclosed. In general, a secured file can only be accessed by authenticated users with appropriate access rights or privileges. Each secured file is provided with a header portion and a data portion, where the header portion contains, or points to, security information. The security information is used to determine whether access to associated data portions of secured files is permitted. These improved approaches can thus impose security on files that are derived from secured files. In one embodiment, files that are deemed derived from a secured file include files that are copies of the secured file. In another embodiment, files that are deemed derived from a secured file include files having content substantially similar to the content of the secured file.
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