I like this post - it's good advice overall. Keys are easy to handle and in some ways more secure than certificate management (which relies on extra unnecessary infrastructure).
Upgrade your SSH keys
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Re: Upgrade your SSH keys
#12If you have any RHEL machines, you might wanna keep an RSA (or ECDSA) key around. RHEL doesn't support Ed25519. I haven't checked, but I presume this also goes for CentOS, Scientific Linux, and other derivatives.
Re: Upgrade your SSH keys
#13https://www.reddit.com/r/netsec/comments/543ncp/upgrade_your...
Here: Generally positive. Netsec: Most upvoted comments being complaints and assertions that it's bad advice. And for some reason, upvoted comments about NSA involvement in curves (which is exactly what 25519 is not).
Re: Upgrade your SSH keys
#14RSA 2048 is still the openssh default, i.e., best current advice from the openssh authors. The fact that this article's author labels that as "yellow" is a red flag.
Re: Upgrade your SSH keys
#15Re: Upgrade your SSH keys
#16github doesn't support ed25519 keys does it?
Re: Upgrade your SSH keys
#17Can someone explain to me why RSA 2048 is "recommended to change"? It's still the default for gpg keys and as far as I know is widely thought to be secure for at least few hundred years!
Your web server needs to key and manage many connections/sec, and any delays feed back into my web developers further arguing against the use of TLS. You can generally expect no one will be trying to break your current TLS sessions ten years from now. If that doesn't apply to your situation, you probably have bigger problems, such as the broken CA model.
Both of these scenarios may be different with GPG.
Re: Upgrade your SSH keys
#18github doesn't support ed25519 keys does it?
Re: Upgrade your SSH keys
#19https://www.reddit.com/r/netsec/comments/543ncp/upgrade_your...
Re: Upgrade your SSH keys
#20I 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]. "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 p…