Could you explain how certificates work for authentication in Git?

Certificates for authentication in Git are usually used when working with remote repositories over HTTPS or SSH protocols with certificates.

Working principle:

• A certificate is a digital document that confirms the authenticity of a user or server.
• When connecting, the Git client verifies the server's certificate (for example, an SSL certificate for HTTPS) to ensure that the connection is secure and that the server is who it claims to be.
• User authentication can be performed using client certificates, which confirm the user's identity without a password.

In the context of Git, the most commonly used are:

• HTTPS with server SSL certificates for secure connection.
• SSH keys (not certificates in the traditional sense), which provide user authentication.

If a client certificate is used, it is stored locally and transmitted to the server to confirm identity.

Thus, certificates provide:

• Data encryption during transmission.
• Authentication of the server and/or client.

This enhances the security of interactions with remote repositories.