The idea is to profile your attacker(s) and modify their attack tools to something that you can silently detect. The speaker gave one example of a cryptor which had been marketed as fully undetectable. In reality, there was an anti-virus program which did detect files crypted using this cryptor. As a result, the speaker hacked the server, modified the cryptor to make it truly undetectables. This approach forces us to ponder the question: Is this the possible future in the (anti-)espionage era?”]
Source: https://securelist.com/is-sexydefense-the-future-of-anti-espionage/32753/