driver-level programming, any methods or techniques?

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Hi, I am working on a project in which part of it, I have to do keystroke encryption to thwart keylogging.. I know it has to be done in low-level C, in which I have no experience.. Is there any help on what are the first steps to take please? Thanks!

Posted 5-Mar-11 1:41am

luwlalina

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CPallini 5-Mar-11 8:36am

What do you mean with 'Keystroke encryption'? If you act at driver level (i.e. if you replace the keyboard driver) then, I suppose, all applications but yours would stop working.

luwlalina 5-Mar-11 8:39am

I don't think I want to replace the keyboard driver, I actually want to modify it so that every keystroke ( not only for my application ), is sent encrypted to the current application. Thanks!

Richard MacCutchan 5-Mar-11 8:41am

Have you considered how the receiving application would decrypt it?

luwlalina 5-Mar-11 8:42am

I will use some encryption algorithm with its corresponding decryption algo.

Andrew Brock 5-Mar-11 21:52pm

The point that they were making is how does the application know to decrypt it?
How are you going to inject your decryption algorithm into all the other running processes?
How are you going to not inject your decryption into the keyboard logger?

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Ozer Karaagac · Accepted Answer · 2011-03-05T13:34:00

Solution 1

I think, you can do it with a keyboard hook.
You may want to take a look at SetWindowsHookEx()[^] function for hook type WH_KEYBOARD_LL and also LowLevelKeyboardProc Callback Function[^].

Posted 5-Mar-11 13:34pm

Ozer Karaagac