Authenticate with the veins in your palm.
You rest your finger on the sensor. The light will come on, and if it is the correct finger, it types in your password for you.
Two-factor authentication allows systems to securely confirm the identity of their users. Here is my take for a home base system.
Use a Tessel and connect the same with Salesforce consuming the Salesforce REST APIs to create an employee check-in system.
Verify the identity of the ride you are taking.