BEGIN SSH2 PUBLIC KEY -ĪAAAB3NzaC1kc3MAAACBAKoxPsYlv8Nu+fncH2ouLiqkuUNGIJo8iZaHdpDABAvCvLZn The following is an example of a key generated by SecureCRT. Starting with SecureCRT and SecureFX 7.3 and newer, keys larger than 2048 are available if needed. Each key is usually between 10 bits in length.
Since the private key is never transmitted over the connection, the public-key authentication method is considered to be more secure than the password authentication method. In contrast with the "password" authentication method where the password is transmitted between the client and the server during the authentication process, the private key contents are not transmitted between the client and the server. Typically the private-key file on the client's machine is protected by a "passphrase", so even if the private-key file is stolen, an attacker must still know the passphrase in order to use it. Public-key authentication is only successful when the client proves that it possesses the "secret" private key linked to the public-key file that the server is configured to use. While the private and public keys within a key pair are related, a private key cannot be derived by someone who only possesses the corresponding public key. The public and private keys are generated with a key generation utility. Public-key authentication employs a linked pair of computer-generated keys - one public and one private - and a procedure that proves the user's identity without exposing the secret key to theft or hijacking.īefore using public-key authentication, the public/private key pair files must be created, with a copy of the public-key file being uploaded to a specific location on the server.
Public-key authentication is a proven, well-established method for authenticating computing devices which is more secure than password authentication. Overview of public-key authentication for Secure Shell The tip below provides a basic overview of public-key authentication, explains how to generate and upload keys to the Secure Shell server, and shows how to configure SecureCRT and SecureFX clients. Index Using Public-Key Authentication in Secure Shell Applications
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