• Putty Public Key Authentication
• Ssh Public Key Putty

PuTTYgen is a key generator tool for creating pairs of public and private SSH keys. It is one of the components of the open-source networking client PuTTY. Although originally written for Microsoft Windows operating system, it is now officially available for. To generate the public/private key pair, enter this in the Command Prompt: ssh-keygen At the first prompt, “Enter file in which to save the key,” press Enter to save it in the default location. Under Actions / Generate a public/private key pair, click Generate. You will be instructed to move the mouse cursor around within the PuTTY Key Generator window as a randomizer to generate the private key. Once the key information appears, click Save private key under Actions / Save the generated key.

The PuTTYgen program is part of PuTTY, an open source networking client for the Windows platform. Git windows generate ssh key.

The location of the newly generated public and private key will be shown as well as the key fingerprint. Click Go Back. Next to the Public Key you generated, click Manage Authorization then click Authorize to activate this public key. Click Go Back. To the right of the Private Key, click on View/Download. Then click the Download Key button. Save the file to your computer and click go back. Generating a Secure Shell (SSH) Public/Private Key Pair. Several tools exist to generate SSH public/private key pairs. The following sections show how to generate an SSH key pair on UNIX, UNIX-like and Windows platforms. The PuTTY Key Generator window is displayed.

Putty Public Key Authentication

1. Download and install PuTTY or PuTTYgen.

   To download PuTTY or PuTTYgen, go to http://www.putty.org/ and click the You can download PuTTY here link.

2. Run the PuTTYgen program.
3. Set the Type of key to generate option to SSH-2 RSA.
4. In the Number of bits in a generated key box, enter 2048.
5. Click Generate to generate a public/private key pair.

   As the key is being generated, move the mouse around the blank area as directed.

6. (Optional) Enter a passphrase for the private key in the Key passphrase box and reenter it in the Confirm passphrase box.

   Note:

   While a passphrase is not required, you should specify one as a security measure to protect the private key from unauthorized use. When you specify a passphrase, a user must enter the passphrase every time the private key is used.

7. Click Save private key to save the private key to a file. To adhere to file-naming conventions, you should give the private key file an extension of .ppk (PuTTY private key).

   Note:

   The .ppk file extension indicates that the private key is in PuTTY's proprietary format. You must use a key of this format when using PuTTY as your SSH client. It cannot be used with other SSH client tools. Refer to the PuTTY documentation to convert a private key in this format to a different format.
8. Select all of the characters in the Public key for pasting into OpenSSH authorized_keys file box.

   Make sure you select all the characters, not just the ones you can see in the narrow window. If a scroll bar is next to the characters, you aren't seeing all the characters.

9. Right-click somewhere in the selected text and select Copy from the menu.
10. Open a text editor and paste the characters, just as you copied them. Start at the first character in the text editor, and do not insert any line breaks.
11. Save the text file in the same folder where you saved the private key, using the .pub extension to indicate that the file contains a public key.
12. If you or others are going to use an SSH client that requires the OpenSSH format for private keys (such as the ssh utility on Linux), export the private key:
    1. On the Conversions menu, choose Export OpenSSH key.
    2. Save the private key in OpenSSH format in the same folder where you saved the private key in .ppk format, using an extension such as .openssh to indicate the file's content.

To generate SSH public and private key pairs on Windows, one of the easiest tools to use, is the PuTTY Key Generator “puttygen.exe” (which can be downloaded from here).
The resulting generated files from the PuTTY Key Generator can be used to set up public key authentication with a remote server, allowing for more secure authentication over normal password based authentication (requires disabling password based authentication).
Download the PuTTY Key Generator
You can download puttygen from the following url:
https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
Run puttygen.exe
When puttygen has loaded you will be presented with a screen such as this:
Generate the public and private keys
Click the “Generate” button on the main window to start the process of generating the key data.
While this is happening, you will need to move your mouse around in the blank area at the top of the application. This is used to help randomize the data used to generate the keys.
Once the progress bar has gone through, the public and private key data will have been generated, and you are ready to save the keys.
Saving the public and private keys
Public Key:
Simply press the “Save public key” button. This will be used on the remote host you want to be able to connect into remotely, using the private key.
Private Key:
You have the option to enter a passphrase if you want to make the key more secure. Enter that in, and the confirmed passphrase.
After thats done (or if you dont want to use a passphrase), simply press the “Save private key” button. Store this key in a safe place.
Using the private key in PuTTY
For information on how to use the private key file in PuTTY, please check the following page:
Using SSH Private Key Files with PuTTY

Ssh Public Key Putty