Back Door
A route through which legitimate users or criminals can bypass security systems in order to access the data they’re after. Contrasts with a front door attack, where a virus or attack is done with help from the user, for instance by downloading an infected email attachment.
Baiting
Baiting describes the situation where a fraudster leaves something out like a USB drive, enticing somebody to pick it up and see what content is on it. The fraudster loads the USB drive up with things like malware and keyloggers, which attack a computer system when plugged in. This scheme is designed to take advantage of people’s curiosity.