Indeed, the "real-world" examples suffer from two problems: 1) The former is not security by obscurity, the car the president is in is a secret. Any attack on

Indeed, the "real-world" examples suffer from two problems: 1) The former is not security by obscurity, the car the president is in is a secret. Any attack on the president is rendered much harder because of the process even if you know what the process is. Just like regular cryptography. 2) This isn't security through obscurity because the attacker learning your system wouldn't help them. Because the attacker is, literally, a bird-brain.