30 years of Failure: the Username/Password combo.

Interesting new study, which is being published by the Human Factors and Ergonomics Society.

"The use of alphanumeric usernames and passwords is the
most often used (and also the cheapest) method of computer
authentication. However, unfortunately human beings are
limited in their information processing capabilities (Cowan, et
al., 2008). People either use simple passwords that are easy to
remember but easy to crack or difficult passwords which are
difficult to remember. Results of our study have shown that
there are very few people who do not deviate from the best
practices for password use."