[Qt-interest] cryptography using qt

[Andre Somers]

Op 9-11-2011 18:11, Karl Ruetz schreef:
> For encryption in Qt apps I usually use the plain old openssl C 
> library (openssl.org).
>
> Depending on the app, the format of the file, the platform, and just 
> who it is you are trying to hide content from, it might be sufficient 
> to do some kind of low-level obfuscation of the text (if the file is 
> text).  You could, for example, XOR the contents of the file with 
> arbitrary value (such as "QT") or a small number of values that you 
> use on successive characters ("QT", "63", "B12") the loop to use "QT" 
> again.

For simple encryption/decryption like the above, I have posted a class 
called SimpleCrypt on the devnet wiki. You can find it here: 
http://developer.qt.nokia.com/wiki/Simple_encryption It basically uses 
the OR trick with a 64 bit key.

Perhaps it can help you, but don't pretend it to be strong encryption.

André

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