Systems and methods for user authentication are disclosed. An example method includes receiving a request for access to a first secured service, the request corresponding to a first user, determining whether or not the request for access is valid, in response to determining that the request for access is valid, determining whether or not the first user has successfully performed a secondary authentication within a predetermined time period of the request for access, and in response to determining that the first user has successfully performed the secondary authentication within the predetermined time period of the valid request for access, providing the first user with access to the secured service.