On Jan 5, 2010, at 5:36 AM, Bill Vlahos wrote:
exporting or viewing the document would be a multi-step process 1)
Decrypt, uncompress, and export the file to the disk, 2) opening the
file. This would be additional steps and would leave the unprotected
file on the file system.
Perhaps there is a way to do this transparently directly from the
program without saving a copy to the disk but I can't think of it.
Opening a document that comes via email or web download appears to
do this but in actuality they download and store a copy of the
actual document somewhere on disk and then open it.
While this might not be a complete solution, maybe it helps: When you
open a document open it as a temp file so at least the file is not
easily grabbed. When your app closes, or maybe even when a viewer in
your app closes or goes to a new item, have it also write over that
temp file with gibberish, or simply have the temp file deleted.
I did that for an app that played videos that were compressed and
saved as custom properties - then reopened as temp files and played.
sims
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