A four-digit passcode is what protects your iPhone, and the sensitive material within it, from strangers or nosey friends. Four digits are the only thing preventing someone from snooping through your pictures and posting them online for the public to see, and that’s if you even have passcode security enabled.
Since it’s so easy to look over someone’s shoulder, it’s difficult for me to place full confidence in four simple numbers. That’s why I primarily use Touch ID to unlock my iPhone. However, Touch ID doesn’t always work if your fingers are sweaty, and noseprint security might just be too… more
Sig Nordal 