If you are prone to forgetting your passwords, you're not alone. To make sure
we remember all our passwords, many of us take measures that defeat the
purpose. These include, as studies have shown, using the same password for everything or writing them down on post-it
notes and sticking them to our computer. But such sloppiness makes
easy work for evil agents out to steal our data and identities. Now physicists from the US and Germany have devised a safer way of
using passwords that takes account of the human need for
memorability.