An attacker uses a social engineering technique to produce a sense of
						obligation within the target to volunteer some key or sensitive piece of
						information. Obligation has to do with actions one feels they need to take
						due to some sort of social, legal, or moral requirement, duty, contract, or
						promise. In the context of social engineering, obligation is closely related
						to reciprocation but is not limited to it. There are various techniques for
						producing a sense of obligation during ordinary modes of communication. One
						method is to compliment the target, and follow up the compliment with a
						question. If performed correctly the target may volunteer a key piece of
						information, sometimes involuntarily. It can also be as simple as holding an
						outer door for someone will usually make them hold the inner door for you.
						It can be escalated to someone giving you private info because you create a
						sense of obligation. This is a common attack vector when targeting customer
						service people.