Re: How to Facilitate and Use Data Protection on DOM (WinCE 6.0)

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Hi!

I am finally able to encrypt and decrypt all the data on DOM :-)
thanks again..Bruce n Paul for ur support!

But, as I had feared earlier.. now I am facing the issue with storing
the encryption key... where do i store it? The device I am using-
Vortex86DX-6354, does not have EEROM.. What approach can I take to
store or fetch the encryption key from anywhere? I need to store a 32-
byte (256 bit AES) key.

It seems to me that storing it on the 'disk' is the right place, although
that does present some potential problems if the disk is removed and
relocated to another device. You could simply use a fixed key that is
derived from some attribute of the device which you can read (Ethernet
address of the card, plus processor serial number, etc.) You're going to
have to figure this out; you're the only one that knows what's important to
this device and what hardware you have. It looks to me like the board runs
DOS, doesn't it? If it does, I think that the chance that it doesn't have
EEPROM is pretty low. Where would the BIOS settings be stored? For that
matter, most Ethernet devices store their Ethernet (globally unique),
addresses in EEPROMs, so it's possible that you could store the data there,
encrypted, of course.

Also, I am not able to retain the IP address after RESET.. what can I
do for this?
Please reply.. all suggestions are really welcome.

It seems that you have not designed your system to persist the registry.
There are several ways to do that, the most common being hive-based registry
which is well-documented in the help.

Paul T.


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