Eclipse/Git: "You're using an RSA key with SHA-1, which is no longer allowed. Please use a newer client or a different key type."

Question

I created a public key in Git using ssh-keygen which was successfully created as .ssh/id_rsa.pub.

I then uploaded it to GitHub in my SSH Keys, and "Authorized" its SSO feature. Everything is uploaded now.

When cloning a repository in Eclipse, I get the following message

Answer 1

According to Github security blog RSA keys with SHA-1 are no longer accepted.

Use the following command to create new SSH key with ECDSAencryption and add it to Github.

ssh-keygen -t ecdsa -b 521 -C "[email protected]"

Original answer with details can be found here

Answer 2

I had to generate an ECDSA key, not an RSA key. Not sure why, but none of the RSA options worked for me, including the default.

ssh-keygen -t ecdsa -b 256 -m PEM

I got this from https://stackoverflow.com/a/71502531/1005607

Then I uploaded it to GitHub (after deleting my old key first), updated my Eclipse SSH2 private key to point to id_ecdsa. Now I can clone repositories.