The Good and Not So Good of Enforcing Password Composition Rules
Authors: John Campbell, Dale Kleeman, Wanli Ma

Date: January 2007
Publication: Journal of Information Systems Security, Volume 16, Issue 1
Page(s): 2 - 8
Publisher: Taylor Francis
Source 1: - Subscription or payment required

Abstract or Summary:
Many systems rely on password composition rules to force users to choose more secure passwords. The findings discussed here are from a study on the enforcement of good password practice in the form of password composition rules. The results show that the enforcement of password composition rules does not discourage users from using meaningful information in passwords. While composition rules reduce password reuse, the overall incidence remains high. Passwords created under these conditions are also perceived to be more difficult to remember. Nevertheless, the enforcement of password composition rules does significantly improve protection against dictionary-based attack.

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