from Hacker News

FBI used Graykey to unlock an iPhone 11 Pro

by buckleyc on 1/18/20, 11:14 PM with 1 comments

  • by arkadiyt on 1/19/20, 12:15 AM

    Stats from the article:

    - 4 digits takes 6.5 minutes to crack on average

    - 6 digits takes 666 minutes to crack on average

    - 10 digits takes 6665760 minutes to crack on average

    All 3 of these work out to the same number: about 12.5 attempts per second.

    So if you use a 5 character _alphanumeric_ passcode (62 character key space), then it would take 62^5 / 12.5 / 60 / 60 / 24 = 848 days to brute force in the worst case (and half that on average). With 6 characters it would take more than a century.