Authentication mechanisms are disclosed herein that authenticate user access to enterprises. For example, either an enterprise associated number or a social security number (SSN) can be provided to the enterprise to enter a first level. Then, any one of a ZIP code number, a device calling/contacting number, a date of birth, and a portion of the SSN can be provided to access applications in the first level. Lastly, a PIN can be provided to enter a second level of the enterprise. Additionally, these authentication mechanisms can be added and/or changed. In the former case, if a user used a SSN to enter the mentioned first level of the enterprise, then a date of birth can be used to update an authentication mechanism. Alternatively, if a user used an enterprise number to gain such access, then part of the SSN can be used for the update. If the user wants to change the authentication mechanism, the date of birth can be used for the update.