Re: keeping data safe offline

[Сергей Мурылев <DemonImp13 () mail ru>]

Hi Erki,

You mentioned in your mail famos problem of encryption: key storing.
This is weakness by design. But you can't get rid it, because you need
access from your application. Actually, you can use other hardware key
(for example with secret algorithm) to improove your system. It will
garantee that only owner of concrete hardware key can access to data.
But it can't garantee that data can't be copied form usb device.
Similarly it will increase cost of your product.

---
Thanks,
Sergey

09.04.2012 12:41, Erki Männiste Wrote:
> 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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> In this guide we examine the importance of Apache-SSL and who needs an SSL certificate.  We look at how SSL works, 
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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
------------------------------------------------------------------------