Could you just rename the extention to .12x or something along those
lines? If someone did run across the file, they wouldn't know what it
was. When you need to access them, save them and rename the extention
back to .jpg or whatever.
Under Linux (which more and more people are using now), there is a
utility/command called "file" which examines a file's contents and tells
you what it is. For example, doing this on a renamed JPG file on my
machine tells me:
andy $file test.12x
test.12x: JPEG image data, JFIF standard 1.01, resolution (DPI), 72 x 72
It isn't perfect (there are some files it just says "Binary data" for),
but it would also detect if you renamed a zip file:
andy $ file ziptest.abc
ziptest.abc: Zip archive data, at least v1.0 to extract
Just thought I'd pose an argument as to why it wouldn't work... You
could of course put them in a password-protected Zip file...
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