When you select the option to remember a password in a KDE application for the first time (for your e-mail account, for example), the KWallet wizard starts by default. KWallet is a password management tool that can collect all passwords and store them in an encrypted file.
To activate KWallet, select
and click . Select and enter a password. This is your master password to open KWallet. It cannot be recovered if you forget it. Click to close the wizard. After this initial configuration, you can open your wallet at any time to view, search, delete, or create entries. Normally you do not need to insert an entry manually. KDE recognizes if a resource requires authentication and KWallet starts automatically, prompting you for the KWallet password.