![]() ![]() ![]() Other authentication methods are only used in very specific situations. Key-basedĪuthentication is the most secure of several modes of authentication usable with OpenSSH, such as plain passwords and Kerberos tickets. Today, OpenSSH is the default SSH implementation on Unix-like systems such as Linux and OS X. With public key authentication, every computer has (i) a publicĪnd (ii) a private "key" (two mathematically-linked algorithms that are effectively impossible to crack). While a password can eventually be cracked with a brute-force attack, SSH keys are nearly impossible to decipher by brute force alone. Provide a more secure way of logging in compared to using a password alone. If your headless, or remote, VPS is visible over the Internet, you should use public key authentication instead of passwords, if at all possible. ![]()
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March 2023
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