How do I generate an SSH2 key using PuttyGen (for PuTTY)?

To create an SSH2 key using PuTTYGen, do the following:

1. Double-click puttygen.exe, select SSH2 RSA key type, key strength is 1024 by default. Click ‘Generate’.    

1. Next, move your mouse around the blank area to create “randomness” in the key generation.    
2. When done, puttygen displays key information, including the public key string to be put in the .pub file on the target, a fingerprint, and a comment. You MUST also enter a passphrase, this is the password that may be a phrase (hence the name �passphrase�).    
3. Click Save private key then, save public key to write these files somewhere on the local machine. In the configuration for PuTTY, you must now associate the private key for your session with the private key you generated and saved above.    
4. For the server, you will need to FTP the public key for your session to /.ssh2/.pub