text: **To generate keys**: The blank area that is indicated by the message is the large blank 
  rectangle on the GUI inside the section of the GUI labeled Key. Continue to move the 
  mouse pointer over the blank area until the progress bar reaches the far right. This 
  action generates random characters to create a unique key pair. 
  
  3. After the keys are generated, save them for later use. Click**Save public key**, as shown in 
  Figure B-3. 
  
  4. You are prompted to enter a name (for example, sshkey.pub) and a location for the public 
  key (for example, C:\Keys\). Enter this information and click**Save**. 
  
  Ensure that you record the SSH public key name and location because this information 
  must be specified later. 
  
  **Public key extension:**By default, the PuTTY key generator saves the public key with 
  no extension. Use the string pub for naming the public key. For example, add the 
  extension .pub to the name of the file to easily differentiate the SSH public key from the 
  SSH private key. 
  
  5. Click**Save private key**. A warning message is displayed (see Figure B-4). Click**Yes**to 
  save the private key without a passphrase. 