1. A method for preventing a first user from making certain misrepresentations in a social network using an authentication system, the method comprising: associating the first user with a user ID; storing a plurality of prompts in association with the user ID; storing the user ID in association with a biometric template of the first user; providing a prompt from the plurality of prompts to the first user; storing a biometric response of the first user thereto in association with the user ID; receiving from the first user of the social network, the biometric response when the first user logs into the social network; storing the received biometric response; receiving a request from a second user of the social network to authenticate the first user of the social network; and sending to the second user of the social network by the authentication system at least a portion of the biometric response of the first user of the social network provided in the last login biometric response.