SSH certificates: the better SSH experience
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SSH certificates for better security, key for infrastructure security.
Summary
SSH's Trust on First Use (TOFU) and public key authentication require manual known_hosts management and falter when host keys change. SSH certificates, issued by a Certification Authority (CA), centralize trust for large-scale deployments, automating verification and eliminating per-host key distribution. This enhances security and reduces operational overhead in environments with numerous servers.