1. WWW 2007 / Track: Security, Privacy, Reliability, and Ethics Session: Passwords and Phishing
A Large-Scale Study of Web Password Habits
Dinei Florencio and Cormac Herley
ˆ
Microsoft Research
One Microsoft Way
Redmond, WA, USA
dinei@microsoft.com, c.herley@ieee.org
ABSTRACT to gain the secret. However, challenge response systems are
We report the results of a large scale study of password use generally regarded as being more time consuming than pass-
and password re-use habits. The study inv