Control access to information on the iPod touch Lock Screen
You can easily access a few commonly used features (such as widgets, media playback controls, and Control Center) from the Lock Screen. (For security, USB connections aren’t allowed when iPod touch is locked.) You can control access to these items when iPod touch is locked.
If you turn off Lock Screen access to a feature, you prevent someone who has your iPod touch from viewing any personal information that it might contain (such as an upcoming event in the Calendar widget). However, you also lose quick access to the information yourself.
Go to Settings > Passcode, then select your options.
You can turn access on or off to the following features while iPod touch is locked:
Widgets (see Add widgets on iPod touch)
Notification Center (see Change notification settings on iPod touch)
Control Center (see Use and customize Control Center on iPod touch)
Siri (see Ask Siri on iPod touch)
Home Control (see Intro to Home on iPod touch)
Wallet (see Add and use passes in Wallet on iPod touch)
Returning missed calls (see Make and receive FaceTime calls on iPod touch)
Connecting to a Mac, a Windows PC, or an accessory with USB (such as when you connect iPod touch to your computer using USB)
Important: If you change the default setting and allow USB connections when iPod touch is locked, you disable an important security feature of your iPod touch.