Lock screen

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The lock screen is what you see once you wake a device up. It tells you to slide from left to right to unlock your device, followed by an optional passcode prompt. Several methods of bypassing the passcode prompt have surfaced multiple times in its lifetime.


The passcode can also be brute-forced if the device is jailbroken, and the passcode is simple (four digits). It takes under 20 minutes to crack a 4 digit numeric passcode, this is the standard passcode for many users.

Passcode length Compexity Time
4 digits numeric (0-9) 18 minutes
4 digits alphanumeric (a-z & 0-9) 19 days
6 digits alphanumeric (a-z & 0-9) 196 years
8 digits alphanumeric (a-z & 0-9) 755 thousand years
8 digits alphanumeric, complex (a-z & special characters & 0-9) 27 million years
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