"turn something on its head" normally means "to treat or present something in a completely new and different way[1]" e.g. when trying to fix a machine, flipping a part over to see if it fits better "the other way"
In this conversation, it was used to mean "flipping the script", to change or reverse something dramatically
The grandparent comment wanted to ask "the opposite question", not "how to make it easier to reverse engineer something", but "how to make it harder to reverse engineer something".
In this conversation, it was used to mean "flipping the script", to change or reverse something dramatically
The grandparent comment wanted to ask "the opposite question", not "how to make it easier to reverse engineer something", but "how to make it harder to reverse engineer something".
[1] https://www.collinsdictionary.com/us/dictionary/english/turn...
[2] https://idioms.thefreedictionary.com/flip+the+script