<p><pre><code> > It's pretty surprising that Apple has the default
> set to be able to use Siri without unlocking the device.
</code></pre>
Siri is turned off by default, so this is actually a pretty misleading thing to say.
The phone iPhone passcode thing is kind of a joke, unfortunately -- it's fairly easy to extract the encrypted image from a locked phone, then brute force it. Since almost everyone just uses a 4-digit simple PIN, doing an exhaustive search is faster than syncing to iTunes.<p>What I'd really like is TPM-type security built into the phone (and used correctly) to protect from brute forcing a short authentication code, and maybe multi-factor auth. e.g. if the phone is inside my house or office (was on my secured wifi, hasn't moved), there can be less security (longer relock interval, shorter passcode, etc.) than if I am out and about. If there were a way to definitively link my phone to my car, I'd be fine with turning off all passcodes -- maybe due to bluetooth pairing or something.<p>Biometrics might actually make sense in phones, too, although I'm not sure how much I like the facial recognition in ice cream sandwich.
Without severely paranoid steps being taken, if someone has your physical device they are going to be be able to gain access to the files on that device. This isn't hard math to do.
<p><pre><code> > In a default setting, Siri let's [sic] a complete stranger see
> your calendar on your passcode locked iPhone 4S, as well as get
> contact information, make a call and send texts and e-mails.
</code></pre>
A complete stranger could also steal your phone. Solution: don't leave your phone accessible to complete strangers.
Siri would be pretty annoying and useless if it required unlocking the phone to use it. If it's actually a bug, I sure hope they don't fix it, or at least make the "correct" behavior optional.
I also found that if you have iOS5 on an iPhone 4, the new camera button allows you to access apps and what-not without unlocking the phone - though it thinks its locked.<p>Double click the home button to get the camera icon, go to camera and press home button and you can access all apps.<p>But if you try to go to the photo gallery, the phone tells you its locked and wont go there.