"On devices running iOS 8, your personal data such as photos, messages (including attachments), email, contacts, call history, iTunes content, notes, and reminders is placed under the protection of your passcode. Unlike our competitors, Apple cannot bypass your passcode and therefore cannot access this data" This is key. The way we engineer software and services can have a major impact on the war against overly invas…
The quote is extremely misleading. Sure, it's encrypted by your passcode, and that's great. It's important to note however that the passcode is just 4 digits long by default, and could be bruteforced by Apple in milliseconds if they wanted to. So to say that "Apple cannot bypass your passcode" is misleading, as guessing it is absurdly easy. http://www.slideshare.net/alexeytroshichev/icloud-keychain-3...
“The passcode is entangled with the device’s UID, so brute-force attempts must be performed on the device under attack. A large iteration count is used to make each attempt slower. The iteration count is calibrated so that one attempt takes approximately 80 milliseconds.”
This is still an argument for using a longer length code, however, since a simple 4-digit number would only take 800 seconds to brute force.