Is it all encrypted on iOS with a password?
Using iOS 6 with a password, according to the iphone user guide page 33, Security Features, does not encrypt everything, just mail messages and attachments:
Setting a passcode turns on data protection, which uses your passcode as the key for encrypting mail messages and attachments stored on iPhone. (Some apps available from the App Store may also use data protection.) A notice at the bottom of the Passcode Lock screen in Settings shows that data protection is enabled.
Also, page 137, Settings, says that only those things that are encrypted are erased:
Erase data after ten failed passcode attempts: Go to Settings > General > Passcode Lock and tap Erase Data. After ten failed passcode attempts, all settings are reset, and all your information and media are erased by removing the encryption key to the data (which is encrypted using 256-bit AES encryption).
But, this article http://support.apple.com/kb/HT2110# clearly implies that everything is encrypted when it says:
You can remove all settings and information from your iPhone, iPad, or iPod touch using "Erase All Content and Settings" in Settings > General > Reset.
and:
Devices that support hardware encryption: Erases user settings and information by removing the encryption key that protects the data. This process takes just a few minutes.
So, is the user guide page 33 incorrect? Or are all my photos, contacts, pdf's, etc. still available after the reset?
iPhone 5, iOS 6.0.1
