Well, We have discussed the encrypted container files, and you have your ssh and gpg keys secured. Now to take the authentication one step further.

 When you authenticate to your system you have to type a login and a password. This is ok but we can improve this. Linux uses PAM (Pluggable Authentication Modules) to set the authentication requirements for the system. We can extend this one step further and greate a OTP (One Time Pad) on a USB key that is then required to be present before you can login. This means that you will need your login, your password, and a special USB key plugged into a USB port on the system to log in.

To start this you will need to download the PAM USB module from HERE  

To continue with the instructions  click the Read More

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