The abundance of password leaks over the past decade has revealed some of the most commonly used—and consequently most vulnerable—passphrases, including "password", "p@$$w0rd", and "1234567". The large body of data has proven invaluable to whitehats and blackhats alike in identifying passwords that on their face may appear strong but can be cracked in a matter of seconds.
Now, Android lock patterns—the password alternative Google introduced in 2008 with the launch of its Android mobile OS—are getting the same sort of treatment. The Tic-Tac-Toe-style patterns, it turns out, frequently adhere to their own sets of predictable rules and often possess only a fraction of the complexity they're capable of. The research is in its infancy since Android lock Patterns (ALPs) are so new and the number of collected real-world-patterns is comparatively miniscule. Still, the predictability suggests the patterns could one day be subject to the same sorts of intensive attacks that regularly visit passwords.