Stop Using 6-Digit iPhone Passcodes (Implications of Combinatorics for Personal Data Security…)

The article entitled “Stop Using 6-Digit iPhone Passcodes” clearly explains passcode security; even though the odds of guessing the right 6 digit sequence is (1/6)^10 = 1 in a million, a company called “Grayshift”  distributes software called “Graykey” which apparently can crack 6 digit passcodes in 3 days time (4 digits only take 2 hours)…

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