under false pretense

classified confidential covert furtive hush-hush restricted secretive surreptitious

backdoor backstairs close inside sneak

camouflaged cryptic discreet disguised dissembled dissimulated in ambush incognito sly sneaky stealthy sub-rosa top-secret unacknowledged under-the-table underhanded

aboveboard forthright honest known open public

clear defined explicit legal legitimate revealed unconcealed