Really:

Such are the difficulties caused by the over-abundance of passwords and codes to those with poor memories that a psychologist in Australia has found it is leading to mental health problems.

Michael Saling, head of neuropsychology at Melbourne University, calls it "busy-line syndrome" and has reported that a growing number of those who can't keep up are seeking medical help.

He said: "It's a condition people develop when they have too much on their plate. They begin to forget details about their life.

"Passwords and PINs are prime candidates for being forgotten, when they are just arbitrary numbers and people can't relate them to anything."