It is very important for iPad owners to keep their devices protected all the time. Apple recommends that users setup a passcode to keep their device secure when it is turned on. Every time the iPad is turned on, it asks for a passcode that only the owner will remember. In addition to letting users create a general passcode, iPad also lets users password protect different apps for an additional layer of security.
On your home screen, select the Settings icon. This gives you access to your iPad's general settings for photos, Safari, videos, email and iPod.
Choose General, then Restrictions. A list of installed apps pop up on your iPad. Select Enable Restrictions to be able to set a password on a specific app.
Upon enabling restrictions, a Set Passcode prompt pops-up similar to the password prompt when you switch on the device. This is where you enter a 4-digit passcode.
It is recommended to choose a different password from the one you have set as the general device password to ensure maximum security.
Select the apps to be protected by the new passcode, then tap Done to finish the process.