Upgrade your SSH keys
I disagree with the author. Before you go upgrading into ed25519, beware that the NSA/NIST is moving away from elliptical curve cryptography because it's very vulnerable to cracking with quantum attacks[0].<p><i>"So let me spell this out: despite the fact that quantum computers seem to be a long ways off and reasonable quantum-resistant replacement algorithms are nowhere to be seen, NSA decided to make this announcement publicly and not quietly behind the scenes. Weirder still, if you haven’t yet upgraded to Suite B, you are now being urged not to. In practice, that means some firms will stay with algorithms like RSA rather than transitioning to ECC at all. And RSA is also vulnerable to quantum attacks."</i><p>Stick with the battle tested RSA keys, which are susceptible but not as much as ECC crypto. 4097 or even better 8192-bit lengths.<p>There's no perceptible user benefits to using ed25519 and it's not even supported everywhere. Also you won't have to rotate all of your keys when workable quantum computers start crackin' everything.<p>[0] <a href="https://blog.cryptographyengineering.com/2015/10/22/a-riddle-wrapped-in-curve/" rel="nofollow">https://blog.cryptographyengineering.com/2015/10/22/a-riddle...</a>