A method of increasing communication security may include receiving, at a first computer system, a first message including a first data portion and a second data portion, wherein the first data portion is associated with a security token, wherein the first data portion includes a first instance of a session key, and wherein the second data portion includes a second instance of the session key. The method may also include generating a second message including the first data portion. The method may further include communicating the second message from the first computer system for delivery to a second computer system.