US Patent 9473490 Bidirectional authentication

Systems, methods, and other embodiments associated with bidirectional authentication are described herein. According to one embodiment, a method includes a user receiving a communication from an entity. In response to receiving the communication from the entity, the method further includes generating a token. The token may be a one-time passcode, personal identification number (PIN), alphanumeric value, code word, pass phrase, or security question. The token is received by a device of the user. Additionally, the token is transmitted to the entity. The user may then receive evidence of the token from the entity.