Proof of Concept for registration/login to website using ssh keys

• user selects ssh public key to upload
• username populated from public key

• user select ssh private key for signing
• use inputs email address as username and ssh key passphrase (if required)
• server is contacted to obtain a random string
• random string is signed with private key
• username, original message and signed message is returned to server
• server validates signed message using stored public key

• registrations are stored in map
• server is restarted daily; thus all registrations are deleted daily