TL;DR Replacing crucial instructions with NOP can sometimes result in a bypass of software restrictions.

The long version is as follows. If you are a person who is interested in reverse engineering or exploit development, it would be safe to assume that you’ve heard of the amazing Corelan Team. Their exploit development tutorial here is a good starting point for anyone who wants to learn the basics of exploit development. I strongly recommend that you have a look at the tutorial before you continue.
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