Hello,

today I have read an old article published by Fravia and written by +puark on how to better protect C programs and this is closed with +puark stating that future articles would have covered the following:


How to use encrypted strings and how to avoid having to decrypt them into memory
How to encrypt parts of your C and C++ program.
How to calculate Cyclic Redundancy Checks on part of your program
How to detect bpx and bpmb type breakpoints in your code
How to stop a cracker from getting any useful information from your program resulting from putting a bpmb for read or write on a key global data variable
How to use system API calls (such as MessageBoxA) in such a way that breakpoints on them never break and API Spy programs don't report their usage


Unfortunately +puark doesn't seem to have written any other article.
I wanted to document myself more on how to do the above things and was wondering if anyone here is willing to give me a hint or two on what to look for or experiment on.


Regards,
yaa