Kryptonite

Kryptonite (https://krypt.co) is the new home for your SSH private key. Generate a new public/private keypair, pair your phone with one or more computers, and use SSH as you normally would. Every time you run an SSH or GIT command on a paired computer, an ssh login request will be sent to your phone for your approval. Kryptonite gives you full control so you always know when your private key is used.

No more accidentally uploading or sending the private key. Kryptonite helps you add your public key to GitHub, AWS, Google Cloud, Digital Ocean, Heroku, or any server that supports SSH.