Probably a good idea to look for a different client, call me tinfoil but I wouldn’t want to touch a very old mechanism that is supported/pushed by a very recognisable 3 letter agency
A surprising amount of services (including Azure last I tried) can only handle RSA keys, so after trying ecdsa only for a while I ended up adding a RSA key again.
With that said - it’s 2023, in almost all cases you should have your keys in a hardware module nowadays, in which case you’d use a different command for keygeneration.
Actually it is the same story with TLS 1.3 and TLS 1.2. A bunch of sites still doesn’t support TLS 1.3 (e. g. arstechnica.com, startpage.com) and some of them only support TLS 1.2 with RSA (e. g. startpage.com).
You can try this yourself in Firefox by disabling ciphers (search for security.ssl3 in about:config) or by setting the minimum TLS version to 1.3 (security.tls.version.min = 4 in about:config).
Strange enough TLS 1.3 still doesn’t support signed ed25519 certificates :| P‐256, NIST P‐384 or NIST P‐521 curves are known to be “backdoored” or having deliberately chosen mathematical weakness. I’m not an expert and just a noob security/selfhoster enthusiast but I don’t want to depend on curves made by NSA or other spy agencies !
I also wondering if the EU isn’t going to implement something similar with all their new spying laws currently discussed…
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