File system Filter Driver Awareness Question-Please Help

[Guest]

Archived from groups: microsoft.public.development.device.drivers,microsoft.public.windbg,microsoft.public.windowsxp.device_driver.dev (More info?)

Hello All
Supppose one writes a Encryption file system filter driver which does On the
fly encryption and decryption will it bother with the OS booting.
For example if some of the OS files are encrypted then the OS will not be
able to boot right. At least the files till the filter driver loads must not
be encrypted. How to do such a check condition. Like what are ll the files
which shud not get encrypted or how to avoid those files getting
encrypted.?? Or is there some other way?
Waiting for ur suggestions
Regards
Shal

 

[Guest]

Archived from groups: microsoft.public.development.device.drivers,microsoft.public.windbg,microsoft.public.windowsxp.device_driver.dev (More info?)

First this is better answered on the ntfsd forum at http://www.osronline.com
Basically encrypting everything is a stupid idea, the files needed prior to
your driver being active will change dynamically, trying to get this right
in a filter driver is a stupid idea. Go ask for suggestions at ntfsd


--
Don Burn (MVP, Windows DDK)
Windows 2k/XP/2k3 Filesystem and Driver Consulting
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"Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
news:%23pOpMkIGEHA.3180@TK2MSFTNGP12.phx.gbl...
> Hello All
> Supppose one writes a Encryption file system filter driver which does On
the
> fly encryption and decryption will it bother with the OS booting.
> For example if some of the OS files are encrypted then the OS will not be
> able to boot right. At least the files till the filter driver loads must
not
> be encrypted. How to do such a check condition. Like what are ll the files
> which shud not get encrypted or how to avoid those files getting
> encrypted.?? Or is there some other way?
> Waiting for ur suggestions
> Regards
> Shal
>
>

 

[Vitual mind]

Saying this is a stupid idea, gives enough knowledge that this person doesn't know how and where to use this technique or he is stupid enough to comment.
Anyways if you are trying the encryption in disk base or the the encryption is done on the system files which need at boot time, for this you must use your decryption algorithm at boot time.