![]() As long as you hold the private key, which is typically stored in the ~/.ssh/ directory, your SSH client should be able to reply with the appropriate response to the server.Ī private key is a guarded secret and as such it is advisable to store it on disk in an encrypted form. ![]() ![]() This challenge-response phase happens behind the scenes and is invisible to the user. Only you, the holder of the private key, will be able to correctly understand the challenge and produce the proper response. While the public key can be used to encrypt the message, it cannot be used to decrypt that very same message. What makes this coded message particularly secure is that it can only be understood by the private key holder. This challenge is an encrypted message and it must be met with the appropriate response before the server will grant you access. If an SSH server has your public key on file and sees you requesting a connection, it uses your public key to construct and send you a challenge. By contrast, the public key can be shared freely with any SSH server to which you wish to connect. The private key is known only to you and it should be safely guarded. ![]() SSH keys are always generated in pairs with one known as the private key and the other as the public key.
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