Was it a brute-force attack with a GrayKey or similar device? Or did someone shoulder-surf and spot the person’s passcode before the theft? In any case, once someone has the passcode, all bets are off, as you’ll see below. We don’t know how the thief broke into this stolen iPhone. Here’s what can happen, and why you should change your passcode to something more secure (I’ll explain how below). If someone can get your passcode, none of the other advanced security features on your iPhone, or in iOS, can protect you the dominoes that secure your life will fall very quickly. All you need is the device passcode to access all of the passwords in iCloud keychain. It simply never occurred to me that if a thief (or law enforcement, or any adversary) has the device passcode, and your iCloud password is in your keychain, they can get your iCloud password from your keychain. It’s also easier for a would-be thief to snoop a target entering a 6-digit passcode than an alphanumeric passphrase. We know GrayKey exists, and if it exists, thieves could have it. Did the thieves crack his 6-digit passcode with a GrayKey or GrayKey-like device? Impossible to say. This is an interesting but alarming story. As John Gruber points out in his comments: And if someone gets access to your passcode, the damages can be severe.ĭaring Fireball recently highlighted a story told by Henrique Prange on Twitter, who recounted that his friend’s iPhone was stolen, which led to the loss of $30,000 from his bank, and an additional $2,500 spent on Apple’s App Store. While six digits may seem secure, because there are one million possibilities for such a passcode, there are ways to crack passcodes. But for most people, Touch ID and Face ID are just convenient layers on top of a six-digit passcode. IPhones and iPads have excellent security, and features such as Touch ID and Face ID help ensure that your data is protected. Security & Privacy If Hackers Crack a Six-Digit iPhone Passcode, They Can Get All Your Passwords

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