One of the funnier implications of the "It's an older code, sir, but it checks out" line from Star Wars is that credential revocation is a much more difficult problem than artificial gravity, integrated bioprostheses, interstellar faster-than-light travel or hard-AI. Remember, that line is spoken by _Admiral_ Piett; so - long ago, in a galaxy far far away - fleet-level auth and cert management was important enough that it was one of a flag officer's main duties. https://infosec.exchange/@david_chisnall/117319592191698274