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  The weak-password problem: Chaos, criticality, and encrypted p-CAPTCHAs

Laptyeva, T. V., Flach, S., & Kladko, K. (2011). The weak-password problem: Chaos, criticality, and encrypted p-CAPTCHAs. EPL, 95(5): 50007.

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 Creators:
Laptyeva, T. V.1, Author           
Flach, S.1, Author           
Kladko, K., Author
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: YB 2012
 Abstract: Vulnerabilities related to weak passwords are a pressing global economic and security issue. We report a novel, simple, and effective approach to address the weak-password problem. Building upon chaotic dynamics, criticality at phase transitions, CAPTCHA recognition, and computational round-off errors, we design an algorithm that strengthens the security of passwords. The core idea of our simple method is to split a long and secure password into two components. The first component is memorized by the user. The second component is transformed into a CAPTCHA image and then protected using the evolution of a two-dimensional dynamical system close to a phase transition, in such a way that standard brute-force attacks become ineffective. We expect our approach to have wide applications for authentication and encryption technologies. Copyright (C) EPLA, 2011

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 Dates: 2011-09
 Publication Status: Issued
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 Identifiers: eDoc: 608175
ISI: 000294325500007
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Title: EPL
Source Genre: Journal
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Pages: - Volume / Issue: 95 (5) Sequence Number: 50007 Start / End Page: - Identifier: ISSN: 0295-5075