When the Agent is locked, you cannot add, modify, or use the Key Agent keys. If you attempt to connect to a host that is configured to use keys in the agent, you will be prompted for your passphrase.
When you unlock the agent, it remains unlocked until you lock it, shut down the agent, or log off Windows.
To lock the Key Agent
From the Key Agent, choose thebutton.
To unlock the Key Agent
From the Key Agent, choose the passphrase.button, and then enter the
Connect to a host that is configured to authenticate using the Key Agent.
When prompted, enter the correct passphrase.
NOTE:There is no way to recover a lost passphrase. If the passphrase is lost or forgotten, you can reset the Key Agent using thebutton in the dialog box. When you do this you lose all the keys stored in the agent.