TL; DR: Android e iOS supportano la crittografia completa del dispositivo.
Android
Le versioni di Android superiori a 4.4 (il tuo dispositivo sarà quasi sicuramente sopra la versione 4.4) hanno la possibilità di abilitare la crittografia completa del dispositivo. Alcuni dispositivi vengono addirittura abilitati immediatamente. Android utilizza la crittografia dm-crypt e c'è una guida su come crittografare un dispositivo Android here .
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Start by heading into the Settings menu and tapping on “Security”. You
can start the process by tapping the “Encrypt phone” option.
The next screen will present a warning to let you know what to expect
once the process is finished. If you’re ready to proceed, hit the
“Encrypt phone” button.
One more warning will present itself which tells you not to interrupt
the process. Once you're ready tap the “Encrypt phone” button to
proceed.
The phone will then reboot and start the encryption process. A
progress bar and estimated time till completion will show up, which
should at least provide an idea of how long the process will take.
Once it’s finished, the phone will reboot and you’re back in business.
If you set up a lock screen password, PIN, or pattern, you’ll have to
put it in now so the device will finish the boot process.
iOS
Se possiedi un iPhone 3GS o successivo, un iPod touch di terza generazione o successivo o qualsiasi iPad, puoi crittografare il tuo dispositivo. La maggior parte dei dispositivi Apple moderni utilizza già la crittografia per impostazione predefinita. I dispositivi Apple utilizzano la crittografia AES-256 per crittografare i dispositivi (nel 2012 AES-256 approvato dalla NSA per l'archiviazione dei dati top-secret ). Qui è una guida su come crittografare il tuo dispositivo Apple.
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On devices running iOS 4–iOS 7, you can do this by going to the
General settings, and choosing Passcode (or iTouch & Passcode). As for
iOS 8-9, Passcode (or “Touch ID & Passcode”) has its own section in
the Settings app. Follow the prompts to create a passcode. You should
set the “Require passcode” option to “Immediately,” so that your
device isn't unlocked when you are not using it. Disable Simple
Passcode so that you can use a code that's longer than 4 digits.
If you choose a passcode that's all-numeric, you will still get a
numeric keypad when you need to unlock your phone, which may be easier
than typing a set of letters and symbols on a tiny virtual keyboard.
You should still try to keep your passcode long even though Apple's
hardware is designed to slow down password-cracking tools. Try
creating a passcode that is more than 6 digits.
Once you've set a passcode, scroll down to the bottom of the Passcode
settings page. You should see a message that says “Data protection
enabled.” This means that the device's encryption is now tied to your
passcode, and that most data on your phone will need that code to
unlock it.