File Encryption and access

[DivZr0]

Hey all -

I didn't know where to put this so I decided to put it in here.

I work with a company that designs specialized software for plant operations. We are trying to figure out how to encrypt files that are access by our software. For example, our software routinely calls bitmaps/autocad drawings/html files that contain sensitive data.

I'm looking for suggestions/options of how one would go about securing these files so they could not be accessed by anyone but that user or be copied off of a particular machine. Any ideas? or suggestions?

Thanks

[Krzemo]

Firstly put a password on database (but it is very poor security).

Than encrypt critical data inside the database - so it become meaningless for others.

Make backups very often :D .

Than protect your program (since access cannot be protected sucesfully) so no one can easily decrypt data and so copied program become useless (registration /BIOS number lock etc).

Best regards,
Krzemo.

[Ejaz]

There are different encryption algos are out there. Have a look at this (http://www.mycrypto.net/encryption/crypto_algorithms.html). You can encrypt the external files with some particular key and decrypt them in your application, before using them to protect the properiatery contents.

Also, when working with products that uses encryption and will be used in other regions, its good to look at the Encryption Export Policy of your country.