Abstract: Techniques user or user device authentication using data based on social associations and interactions of users or user devices are presented herein. In an aspect, a method includes receiving social graph transaction history data associated with a user identity of a user and contact information associated with the user identity, wherein the social graph transaction history data includes data relating to usage of the contact information for communication between users via respective user devices. The method further includes analyzing the social graph transaction history data, and based on the analyzing, determining a degree of confidence that the user identity is authentic.

Abstract: Technologies are generally described for multi factor security authentication algorithm methods in authorizing and using client devices to perform banking transactions. A customer can register and associate a client device with their account. The customer can further create unique login information associated with their account. A customer's login information, client device, and a push confirmation must be verified for accuracy prior to allowing the customer to perform banking operations. Using multi factor authentication process, banking transactions can be performed more reliably and securely.