Not really. Have the option to set both a long passphrase and a PIN code.<p>The long passphrase is used to mount the encrypted file system upon startup, and the PIN code is used merely as a &quot;screen lock&quot;, as a casual deterrent from your friends and casual thieves from swiping through your photos before you can catch them.<p>The file system can be automatically unmounted after a set period of inactivity, or if the user wants to unmount it on demand. After the file system is unmounted, the data is secure again and the long passphrase will once again be needed before anything can be done with the phone.