Re: keeping data safe offline

[Stephanus J Alex Taidri <securityfocus.ae () taidri com>]

Hi Erki,

As we most aware, client-side security do not work.
Once user has access to physical, most likely there's nothing much you can do.

To make it harder on the encryption part, you may think of store the
key into the cloud or remote network rather that hard-coded it into
your application. In this case, user may still extract and obtain the
encrypted data but make sure you make them difficult to decrypt it
(maybe double encryption using 3DES then AES256, etc).

The other thing you can consider, is to implement DRM (Digitals Right
Management) feature on the network to access those USB sticks.

Kind regards,
SJ Alex Taidri

2012/4/9 Erki Männiste <Erki.Manniste () webmedia ee>:
> I am developing a software that is going to be distributed to end-users on usb sticks. The application and the 
> content will be stored on that device and the content will be stored in a one-file sqlCE database, it will be crypted 
> by default and will be encrypted by the application on-the-fly.
> My client has made it clear, that he wants to keep end-users from copying the content and using it on any other 
> device but that very stick. Now, due to the offline requirement this is impossible to achive because i have to store 
> the encryption key somewhere in the code and users are able to access the data while in unencrypted state.
> Can anybody recommend me any mechanism that i could apply, to make it more difficult for users to copy the content?
>
> ERKI
>
>
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------------------------------------------------------------------------
Securing Apache Web Server with thawte Digital Certificate
In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, how 
it benefits your company and how your customers can tell if a site is secure. You will find out how to test, purchase, 
install and use a thawte Digital Certificate on your Apache web server. Throughout, best practices for set-up are 
highlighted to help you ensure efficient ongoing management of your encryption keys and digital certificates.

http://www.dinclinx.com/Redirect.aspx?36;4175;25;1371;0;5;946;e13b6be442f727d1
------------------------------------------------------------------------