The OpenSSH server, among others, requires your public key to be given to it in a one-line format before it will accept authentication with your private key. (SSH-1 servers also used this method.) The Public key for pasting into OpenSSH authorizedkeys file gives the public-key data in the correct one-line format. Jul 19, 2013 Consequently, PuTTY does not have native support for reading OpenSSH's SSH-2 private key files. However, PuTTY does have a companion named PuTTYgen (an RSA and DSA key generation utility), that can convert OpenSSH private key files into PuTTY's format; allowing you to connect to your cloud server from a Windows machine, with the added security.
Before you begin![]()
Using SSH public-key authentication to connect to a remote system is a robust, more secure alternative to logging in with an account password or passphrase. SSH public-key authentication relies on asymmetric cryptographic algorithms that generate a pair of separate keys (a key pair), one 'private' and the other 'public'. You keep the private key a secret and store it on the computer you use to connect to the remote system. Conceivably, you can share the public key with anyone without compromising the private key; you store it on the remote system in a
.ssh/authorized_keys directory.
To use SSH public-key authentication:
Generate Ssh Public Key From Private Key![]()
Generate Public Private Key PairSet up public-key authentication using SSH on a Linux or macOS computer
To set up public-key authentication using SSH on a Linux or macOS computer:
Set up public-key authentication using PuTTY on a Windows 10 or Windows 8.x computerGenerate Private And Public Key Putty
The PuTTY command-line SSH client, the PuTTYgen key generation utility, the Pageant SSH authentication agent, and the PuTTY SCP and SFTP utilities are packaged together in a Windows installer available under The MIT License for free download from the PuTTY development team.
After installing PuTTY:
Ssh Keygen Generate Public Key From Private
Generate Public Key From Private Key Putty For Windows 10
The next time you log into your Windows desktop, Pageant will start automatically, load your private key, and (if applicable) prompt you for the passphrase.
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