Hard disk Encryption

  • Thread starter Thread starter Shalini
  • Start date Start date
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Shalini

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
 
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,
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
 
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.
 
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 :)
 
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.
 
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intellli
 
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
 
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