Number of different passwords used by enterprise IT users
Study: Benchmarking: Passwords -- The Sad Truth About Security
Date: October 2006
19% of enterprise IT users use only one password to access applications at work.
35% use two or three different passwords.
46% use four or more different passwords.
Whether users had one, two to three, or four or more passwords to remember at work, roughly one third of all of them wrote down their passwords.