backdoor Synonyms

back entrance backyard offstage backstage backroom back room back passages back channel daleth unseen underhanded underhand liftgate logic bomb anal orifice rear entrance dissimulated side door unpublished undercover off the record conspiratorial off-stage camouflaged computer virus underground trojan surreptitious covert covered confidential clouded classified clandestine behind backstairs back stairs back door back creeper cryptic stealthy secret private postern furtive esoteric enigmatical door dissembled