A secret encryption cipher baked into radio systems used by critical infrastructure workers, police, and others around the world is finally seeing sunlight. Researchers say it isn’t pretty. https://t.co/ywQ3d4FA7K
Modern processors block you from executing nonexistent instructions. But early microprocessors like the Intel 8086 (1978) didn't check for illegal instructions. Running one could provide hidden functionality or even give access to hidden registers you couldn't otherwise access.🧵