Hard disk Encryption

Posted: 02-16-2004, 09:59 PM
Hi Guys
Guys i have 2 questions.
I want some information on Encryption of Hard disks.

My First Question
Right now i am in dilemma how to proceed for encryption.
Whether to go for File System Filter Drivers or Encrypting the hard disk
sector by sector.

My Second Question

I did write a small code for Hard disk sector by sector encryption but it
crashes the OS.
It works fine for all the partitions except C: where the OS is loaded. Why
does it crash the OS. Does it mean that Windows is requesting some Data
from the hard disk while the operation proceeds and as it is encrypted data
it crashes or is it some other reason.??
I am sure my code is working perfect because i use it to encrypt/decrypt all
the otehr partitions which have worked perfectly...

Expecting ur replies.

Regards
Shalini


Hard disk Encryption


Responses to "Hard disk Encryption"

Don Burn
Guest
Posts: n/a
 
Re: Hard disk Encryption
Posted: 02-16-2004, 10:11 PM
If you need to encrypt all the drives, you will have to go with a file
system filter. The problem with encrypting the hard disk is that there are
parts of the system that are not loaded by the standard drivers. Encrypting
all of the boot drive, or the drive where the OS resides will have problems
since you unencrypt code will not be present at startup to decrypt those
blocks.

--
Don Burn (MVP, Windows DDK)
Windows 2k/XP/2k3 Filesystem and Driver Consulting
Remove StopSpam from the email to reply

"Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
news:u5GragN9DHA.1592@TK2MSFTNGP10.phx.gbl...
> Hi Guys
> Guys i have 2 questions.
> I want some information on Encryption of Hard disks.
>
> My First Question
> Right now i am in dilemma how to proceed for encryption.
> Whether to go for File System Filter Drivers or Encrypting the hard disk
> sector by sector.
>
> My Second Question
>
> I did write a small code for Hard disk sector by sector encryption but it
> crashes the OS.
> It works fine for all the partitions except C: where the OS is loaded. Why
> does it crash the OS. Does it mean that Windows is requesting some Data
> from the hard disk while the operation proceeds and as it is encrypted
data
> it crashes or is it some other reason.??
> I am sure my code is working perfect because i use it to encrypt/decrypt
all
> the otehr partitions which have worked perfectly...
>
> Expecting ur replies.
>
> Regards
> Shalini
>
>

Shalini
Guest
Posts: n/a
 
Re: Hard disk Encryption
Posted: 02-16-2004, 10:28 PM
Don,
Thanks for the reply.
But lets consider this case
Lets forget about booting. I am not worried that it will not boot. But
why does my program which runs on all the other partitions crashes the OS
when i encrypt C:.
Could u please tell me ..
Thanks and waiting for reply.
Shalini


"Don Burn" <burn@stopspam.acm.org> wrote in message
news:1032g0an4nl1710@corp.supernews.com...
> If you need to encrypt all the drives, you will have to go with a file
> system filter. The problem with encrypting the hard disk is that there
are
> parts of the system that are not loaded by the standard drivers.
Encrypting
> all of the boot drive, or the drive where the OS resides will have
problems
> since you unencrypt code will not be present at startup to decrypt those
> blocks.
>
> --
> Don Burn (MVP, Windows DDK)
> Windows 2k/XP/2k3 Filesystem and Driver Consulting
> Remove StopSpam from the email to reply
>
> "Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
> news:u5GragN9DHA.1592@TK2MSFTNGP10.phx.gbl...
> > Hi Guys
> > Guys i have 2 questions.
> > I want some information on Encryption of Hard disks.
> >
> > My First Question
> > Right now i am in dilemma how to proceed for encryption.
> > Whether to go for File System Filter Drivers or Encrypting the hard disk
> > sector by sector.
> >
> > My Second Question
> >
> > I did write a small code for Hard disk sector by sector encryption but
it
> > crashes the OS.
> > It works fine for all the partitions except C: where the OS is loaded.
Why
> > does it crash the OS. Does it mean that Windows is requesting some Data
> > from the hard disk while the operation proceeds and as it is encrypted
> data
> > it crashes or is it some other reason.??
> > I am sure my code is working perfect because i use it to encrypt/decrypt
> all
> > the otehr partitions which have worked perfectly...
> >
> > Expecting ur replies.
> >
> > Regards
> > Shalini
> >
> >
>
>

David J. Craig
Guest
Posts: n/a
 
Re: Hard disk Encryption
Posted: 02-16-2004, 10:32 PM
Not necessarily true, Don. There is one product that works and encrypts
all the hard drive. Try www.safeboot.com and see their solution. I
know how it works and it will require months of work for a single
developer.

"Don Burn" <burn@stopspam.acm.org> wrote in message
news:1032g0an4nl1710@corp.supernews.com...
> If you need to encrypt all the drives, you will have to go with a file
> system filter. The problem with encrypting the hard disk is that
there are
> parts of the system that are not loaded by the standard drivers.
Encrypting
> all of the boot drive, or the drive where the OS resides will have
problems
> since you unencrypt code will not be present at startup to decrypt
those
> blocks.
>
> --
> Don Burn (MVP, Windows DDK)
> Windows 2k/XP/2k3 Filesystem and Driver Consulting
> Remove StopSpam from the email to reply
>
> "Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
> news:u5GragN9DHA.1592@TK2MSFTNGP10.phx.gbl...
> > Hi Guys
> > Guys i have 2 questions.
> > I want some information on Encryption of Hard disks.
> >
> > My First Question
> > Right now i am in dilemma how to proceed for encryption.
> > Whether to go for File System Filter Drivers or Encrypting the hard
disk
> > sector by sector.
> >
> > My Second Question
> >
> > I did write a small code for Hard disk sector by sector encryption
but it
> > crashes the OS.
> > It works fine for all the partitions except C: where the OS is
loaded. Why
> > does it crash the OS. Does it mean that Windows is requesting some
Data
> > from the hard disk while the operation proceeds and as it is
encrypted
> data
> > it crashes or is it some other reason.??
> > I am sure my code is working perfect because i use it to
encrypt/decrypt
> all
> > the otehr partitions which have worked perfectly...
> >
> > Expecting ur replies.
> >
> > Regards
> > Shalini
> >
> >
>
>

Alex
Guest
Posts: n/a
 
Re: Hard disk Encryption
Posted: 02-16-2004, 11:34 PM
Probably it is a combination of MBR sector Int13 hook, that installs a DOS
persector driver coombined with a windows (filter? IFS?) driver that takes
over when the OS starts loading..
No rocket science...really...at least the int13 part

"David J. Craig" <SeniorDriversWriter@shogunyoshimuni.com.net> wrote in
message news:OazpJzN9DHA.3704@tk2msftngp13.phx.gbl...
> Not necessarily true, Don. There is one product that works and encrypts
> all the hard drive. Try www.safeboot.com and see their solution. I
> know how it works and it will require months of work for a single
> developer.
>
> "Don Burn" <burn@stopspam.acm.org> wrote in message
> news:1032g0an4nl1710@corp.supernews.com...
> > If you need to encrypt all the drives, you will have to go with a file
> > system filter. The problem with encrypting the hard disk is that
> there are
> > parts of the system that are not loaded by the standard drivers.
> Encrypting
> > all of the boot drive, or the drive where the OS resides will have
> problems
> > since you unencrypt code will not be present at startup to decrypt
> those
> > blocks.
> >
> > --
> > Don Burn (MVP, Windows DDK)
> > Windows 2k/XP/2k3 Filesystem and Driver Consulting
> > Remove StopSpam from the email to reply
> >
> > "Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
> > news:u5GragN9DHA.1592@TK2MSFTNGP10.phx.gbl...
> > > Hi Guys
> > > Guys i have 2 questions.
> > > I want some information on Encryption of Hard disks.
> > >
> > > My First Question
> > > Right now i am in dilemma how to proceed for encryption.
> > > Whether to go for File System Filter Drivers or Encrypting the hard
> disk
> > > sector by sector.
> > >
> > > My Second Question
> > >
> > > I did write a small code for Hard disk sector by sector encryption
> but it
> > > crashes the OS.
> > > It works fine for all the partitions except C: where the OS is
> loaded. Why
> > > does it crash the OS. Does it mean that Windows is requesting some
> Data
> > > from the hard disk while the operation proceeds and as it is
> encrypted
> > data
> > > it crashes or is it some other reason.??
> > > I am sure my code is working perfect because i use it to
> encrypt/decrypt
> > all
> > > the otehr partitions which have worked perfectly...
> > >
> > > Expecting ur replies.
> > >
> > > Regards
> > > Shalini
> > >
> > >
> >
> >
>
>

David J. Craig
Guest
Posts: n/a
 
Re: Hard disk Encryption
Posted: 02-17-2004, 12:07 AM
Go ahead and try it. Try key management, which encryption to implement,
user interface in the BIOS only mode, handover to protected mode drivers
that don't have the key, etc. A single person trying to implement this
will require at least six months and probably a year for someone who
beginning to understand the problems involved. Do you want security or
just the appearance of security? Not easy to do.

"Alex" <AlX@a> wrote in message
news:eXyB8VO9DHA.2924@tk2msftngp13.phx.gbl...
> Probably it is a combination of MBR sector Int13 hook, that installs a
DOS
> persector driver coombined with a windows (filter? IFS?) driver that
takes
> over when the OS starts loading..
> No rocket science...really...at least the int13 part
>
> "David J. Craig" <SeniorDriversWriter@shogunyoshimuni.com.net> wrote
in
> message news:OazpJzN9DHA.3704@tk2msftngp13.phx.gbl...
> > Not necessarily true, Don. There is one product that works and
encrypts
> > all the hard drive. Try www.safeboot.com and see their solution. I
> > know how it works and it will require months of work for a single
> > developer.
> >
> > "Don Burn" <burn@stopspam.acm.org> wrote in message
> > news:1032g0an4nl1710@corp.supernews.com...
> > > If you need to encrypt all the drives, you will have to go with a
file
> > > system filter. The problem with encrypting the hard disk is that
> > there are
> > > parts of the system that are not loaded by the standard drivers.
> > Encrypting
> > > all of the boot drive, or the drive where the OS resides will have
> > problems
> > > since you unencrypt code will not be present at startup to decrypt
> > those
> > > blocks.
> > >
> > > --
> > > Don Burn (MVP, Windows DDK)
> > > Windows 2k/XP/2k3 Filesystem and Driver Consulting
> > > Remove StopSpam from the email to reply
> > >
> > > "Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
> > > news:u5GragN9DHA.1592@TK2MSFTNGP10.phx.gbl...
> > > > Hi Guys
> > > > Guys i have 2 questions.
> > > > I want some information on Encryption of Hard disks.
> > > >
> > > > My First Question
> > > > Right now i am in dilemma how to proceed for encryption.
> > > > Whether to go for File System Filter Drivers or Encrypting the
hard
> > disk
> > > > sector by sector.
> > > >
> > > > My Second Question
> > > >
> > > > I did write a small code for Hard disk sector by sector
encryption
> > but it
> > > > crashes the OS.
> > > > It works fine for all the partitions except C: where the OS is
> > loaded. Why
> > > > does it crash the OS. Does it mean that Windows is requesting
some
> > Data
> > > > from the hard disk while the operation proceeds and as it is
> > encrypted
> > > data
> > > > it crashes or is it some other reason.??
> > > > I am sure my code is working perfect because i use it to
> > encrypt/decrypt
> > > all
> > > > the otehr partitions which have worked perfectly...
> > > >
> > > > Expecting ur replies.
> > > >
> > > > Regards
> > > > Shalini
> > > >
> > > >
> > >
> > >
> >
> >
>
>

Guest
Posts: n/a
 
Hard disk Encryption
Posted: 02-17-2004, 06:12 AM
encryption is based on attraction attraction is based on
seduction and seduction is baased on haaaa haaaa ur
intellli
>-----Original Message-----
>Hi Guys
>Guys i have 2 questions.
>I want some information on Encryption of Hard disks.
>
>My First Question
>Right now i am in dilemma how to proceed for encryption.
>Whether to go for File System Filter Drivers or
Encrypting the hard disk
>sector by sector.
>
>My Second Question
>
>I did write a small code for Hard disk sector by sector
encryption but it
>crashes the OS.
>It works fine for all the partitions except C: where the
OS is loaded. Why
>does it crash the OS. Does it mean that Windows is
requesting some Data
>from the hard disk while the operation proceeds and as it
is encrypted data
>it crashes or is it some other reason.??
>I am sure my code is working perfect because i use it to
encrypt/decrypt all
>the otehr partitions which have worked perfectly...
>
>Expecting ur replies.
>
>Regards
>Shalini
>
>
>.
>
Alex
Guest
Posts: n/a
 
Re: Hard disk Encryption
Posted: 02-17-2004, 09:56 AM
Impementing in the boot sector a Int13 hook to do per sector encryption is
easy... )
I never sed it is easy to do "all that"....
Implementing a card reader/USB reader/etc.. with only port acces is probably
going to be a real pain...
But, if you go for the password only approach things are getting a lot easy

"David J. Craig" <SeniorDriversWriter@shogunyoshimuni.com.net> wrote in
message news:%232RZAoO9DHA.2756@TK2MSFTNGP10.phx.gbl...
> Go ahead and try it. Try key management, which encryption to implement,
> user interface in the BIOS only mode, handover to protected mode drivers
> that don't have the key, etc. A single person trying to implement this
> will require at least six months and probably a year for someone who
> beginning to understand the problems involved. Do you want security or
> just the appearance of security? Not easy to do.
>
> "Alex" <AlX@a> wrote in message
> news:eXyB8VO9DHA.2924@tk2msftngp13.phx.gbl...
> > Probably it is a combination of MBR sector Int13 hook, that installs a
> DOS
> > persector driver coombined with a windows (filter? IFS?) driver that
> takes
> > over when the OS starts loading..
> > No rocket science...really...at least the int13 part
> >
> > "David J. Craig" <SeniorDriversWriter@shogunyoshimuni.com.net> wrote
> in
> > message news:OazpJzN9DHA.3704@tk2msftngp13.phx.gbl...
> > > Not necessarily true, Don. There is one product that works and
> encrypts
> > > all the hard drive. Try www.safeboot.com and see their solution. I
> > > know how it works and it will require months of work for a single
> > > developer.
> > >
> > > "Don Burn" <burn@stopspam.acm.org> wrote in message
> > > news:1032g0an4nl1710@corp.supernews.com...
> > > > If you need to encrypt all the drives, you will have to go with a
> file
> > > > system filter. The problem with encrypting the hard disk is that
> > > there are
> > > > parts of the system that are not loaded by the standard drivers.
> > > Encrypting
> > > > all of the boot drive, or the drive where the OS resides will have
> > > problems
> > > > since you unencrypt code will not be present at startup to decrypt
> > > those
> > > > blocks.
> > > >
> > > > --
> > > > Don Burn (MVP, Windows DDK)
> > > > Windows 2k/XP/2k3 Filesystem and Driver Consulting
> > > > Remove StopSpam from the email to reply
> > > >
> > > > "Shalini" <kandukondein@NOSPAMyahoo.com> wrote in message
> > > > news:u5GragN9DHA.1592@TK2MSFTNGP10.phx.gbl...
> > > > > Hi Guys
> > > > > Guys i have 2 questions.
> > > > > I want some information on Encryption of Hard disks.
> > > > >
> > > > > My First Question
> > > > > Right now i am in dilemma how to proceed for encryption.
> > > > > Whether to go for File System Filter Drivers or Encrypting the
> hard
> > > disk
> > > > > sector by sector.
> > > > >
> > > > > My Second Question
> > > > >
> > > > > I did write a small code for Hard disk sector by sector
> encryption
> > > but it
> > > > > crashes the OS.
> > > > > It works fine for all the partitions except C: where the OS is
> > > loaded. Why
> > > > > does it crash the OS. Does it mean that Windows is requesting
> some
> > > Data
> > > > > from the hard disk while the operation proceeds and as it is
> > > encrypted
> > > > data
> > > > > it crashes or is it some other reason.??
> > > > > I am sure my code is working perfect because i use it to
> > > encrypt/decrypt
> > > > all
> > > > > the otehr partitions which have worked perfectly...
> > > > >
> > > > > Expecting ur replies.
> > > > >
> > > > > Regards
> > > > > Shalini
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

 
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