We make use of SSH keys to securely connect to the Elja login node. Every SSH key comes in a pair; a private key which is hosted on your local machine, and a public key which is hosted on the login node.
You should under no circumstances share the content of your private key. Especially if asked by admins.
An SSH key should be unique to the machine it is made on (i.e. do not copy/send them between machines). If you wish to use more than one machine to connect to Elja you need to generate a key for each machine and contact the admins.