A while back (probably 10+ years) I read a cool article on the cat and mouse game between cable TV hackers and the security team at one of the big US cable TV companies. At a certain point, the hackers had the upper hand and had broken the security of the smart cards which were in use. But the security team turned it round by delivering a sequence of small, seemingly innocuous OTA updates to the card software, locking hackers out of the population of valid cards. Or something like that. Does anyone remember this article/event?