A note on proactive password checking

  • Authors:
  • Jianxin Jeff Yan

  • Affiliations:
  • University of Cambridge

  • Venue:
  • Proceedings of the 2001 workshop on New security paradigms
  • Year:
  • 2001

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Abstract

Nowadays, proactive password checking algorithms are based on the philosophy of the dictionary attack, and they often fail to prevent some weak passwords with low entropy. In this paper, a new approach is proposed to deal with this new class of weak passwords by (roughly) measuring entropy. A simple example is given to exploit effective patterns to prevent low-entropy passwords as the first step of entropy-based proactive password checking.