The top 10 passcodes you should never use on your iPhone

Are you one of the many people who is using a dangerously easy-to-guess passcode on your iPhone?

Maybe you should do something about it – sooner rather than later.

The warning comes after new research suggested that 15% of all iPhone owners use one of just ten passwords on their lock screen:

Apple iPhone app developer Daniel Amitay published the interesting research, looking at the four digit passcodes that users choose to secure their systems with.

Fortunately, he didn’t snoop on the actual passcodes used by iPhone users to lock their devices – but instead anonymously collected the codes chosen by users to secure the “Big Brother Camera Security” app he develops. In all, Amitay collected over 204,000 passcodes.

Amitay postulated that as Big Brother’s password setup and lock screen are nearly identical to the actual iPhone lock screen, the likelihood is…

Read more in my article on the Naked Security website.

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Graham Cluley •   @gcluley

Graham Cluley is a veteran of the cybersecurity industry, having worked for a number of security companies since the early 1990s when he wrote the first ever version of Dr Solomon's Anti-Virus Toolkit for Windows. Now an independent analyst, he regularly makes media appearances and is an international public speaker on the topic of cybersecurity, hackers, and online privacy. Follow him on Twitter, Mastodon, Threads, Bluesky, or drop him an email.