Even though MITM is a very important attack vector, we've seen recently how the strength of the private key file encryption can overnight come under scrutiny of

Even though MITM is a very important attack vector, we've seen recently how the strength of the private key file encryption can overnight come under scrutiny of world-wide IT media (spoiler: Linode private key has a 'secure' password): https://blog.linode.com/2013/04/16/security-incident-update/ https://blog.linode.com/2013/04/16/security-incident-update/