You may wish to scramble your passcodes for security reasons. This is easily done and it's a great idea! Keep in mind your participant passcode is known to all those you've invited on your past conference calls so it makes sense to change it now and then as well as your moderator passcode.
To generate new codes, log in to your account on the customer portal. Select “My Account settings” from the taskbar on the left. Select the “Edit” option the actions bar as seen below:
The screen will refresh and you will see "Assign New" buttons in the “Access Codes” section. Click “Assign New” to generate new moderator or access codes.
Please be sure to record the new codes. You will be asked whether you wish to continue before making the change.