Apple ipod touch fourth gen 32gb 用户指南

Security Features

Security features help protect the information on iPod touch from being accessed  
by others.

You can set a passcode that you must enter each time you turn on or wake up 
iPod touch.
Set a passcode:  Choose Settings > General > Passcode Lock and enter a 4-digit 
passcode, then enter the passcode again to verify it. iPod touch then requires you to 
enter the passcode to unlock it or to display the passcode lock settings.
Setting a passcode turns on data protection (iPod touch 3rd generation or later). Data 
protection uses your passcode as the key for encrypting mail messages and their 
attachments stored on iPod touch. (Data protection may also be used by some apps 
available in the App Store.) A notice at the bottom of the Passcode Lock screen in 
Settings indicates when data protection is enabled.
To increase the security of iPod touch, turn off Simple Passcode and use a longer 
passcode with a combination of numbers, letters, punctuation, and special characters. 
See “Passcode Lock” on page 165.

On an iPod touch 3rd generation that didn’t ship with iOS 4 or later, you 

must also restore iOS software to enable data protection. See “Restoring iPod touch” on 
page 215.

Find My iPod touch helps you locate and secure your iPod touch using the free Find 
My iPhone app on another iPhone, iPad, or iPod touch, or using a Mac or PC with a 
web browser. Find My iPod touch includes:

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Locate on a map:  View the approximate location of your iPod touch on a  
full-screen map

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Display a Message or Play a Sound:  Lets you compose a message that will  
appear on your iPod touch screen, or play a sound at full volume for two minutes, 
even if the Ring/Silent switch is set to silent

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Remote Passcode Lock:  Lets you remotely lock your iPod touch and create a 4-digit 
passcode, if you haven’t set one previously

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Remote Wipe:  Lets you protect your privacy by erasing all media and data on 
iPod touch, restoring it to factory settings

Use Find My iPod touch:  You need to turn on Find My iPod touch on iPod touch 
before you can use these features. See “Setting Up MobileMe Accounts” on page 20.

Basics