file identification

NTFSD
1

I’m looking for a way to add a tag to a file so that the filter driver can identify

this file. For example, I have an encrypted file say foo.txt with tag. When notepad

opens this file, if a filter driver is installed, the filter driver will identify this file

and fire up a decrypting procedure to open this file. If the filter driver is not

installed, notepad will get garbage because the file is encrypted. Is there any

way to add this identification tag to a file (not add in head or end of file, that will

change the file size)? Is reparse point an option to do that? If yes, how to do that?

Thanks in advance

2

If it is NTFS you can add another data stream to the file.

“Dongli Wu” wrote in message
news:xxxxx@ntfsd…

I’m looking for a way to add a tag to a file so that the filter driver can
identify
this file. For example, I have an encrypted file say foo.txt with tag. When
notepad
opens this file, if a filter driver is installed, the filter driver will
identify this file
and fire up a decrypting procedure to open this file. If the filter driver
is not
installed, notepad will get garbage because the file is encrypted. Is there
any
way to add this identification tag to a file (not add in head or end of
file, that will
change the file size)? Is reparse point an option to do that? If yes, how to
do that?

Thanks in advance