suppose you worked on a classified algorithm, then got a job at a not-so-secret place. you could very well leak that algorithm out or even miscellaneous implem

suppose you worked on a classified algorithm, then got a job at a not-so-secret place. you could very well leak that algorithm out or even miscellaneous implementation details (or whatever) in your job at the new place, even unwittingly, and so .gov could argue that they'd need to audit that so as to ensure no classified info has not been disclosed via your work.