As simple as the concept is, the passcode required to access an iPhone was an important security advance when it was introduced with the first version of the device in 2007. Users also have the ability now to turn off the simple four-digit passcode and turn on a longer alphanumeric passcode instead, which adds more security to the system. 2019 was a tumultuous year for Facebook as it continued to grapple with privacy fallout after Cambridge Analytica, as well as dealing with a slew of security challenges.”]