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Search Publications by: Kristen K. Greene (Fed)

Displaying 76 - 100 of 106

Measuring the Usability and Security of Permuted Passwords on Mobile Platforms

April 25, 2016

Author(s)

Kristen K. Greene, John M. Kelsey, Joshua M. Franklin

Password entry on mobile devices significantly impacts both usability and security, but there is a lack of usable security research in this area, specifically for complex password entry. To address this research gap, we set out to assign strength metrics

Effects of Password Permutation on Subjective Usability Across Platforms

August 4, 2015

Author(s)

Kristen Greene

The current work examines subjective password usability across platformsdesktop, smartphone, and tabletusing system- generated passwords that adhere to the stricter password requirements found in higher-security enterprise environments. This research

The Authentication Equation: A Tool to Visualize the Convergence of Security and Usability of Text-Based Passwords

August 4, 2015

Author(s)

Cathryn A. Ploehn, Kristen Greene

Password management is the ubiquitous struggle of the modern human. Despite usability playing a vital role in authentication, many password policies and requirements focus on security without sufficient consideration of human factors. In fact, security and

Tap On, Tap Off: Onscreen Keyboards and Mobile Password Entry

May 1, 2015

Author(s)

Kristen Greene, Joshua M. Franklin, John M. Kelsey

Password entry on mobile devices significantly impacts both usability and security, but there is a dearth of usable security research in this area, specifically for complex password entry. To address this research gap, we set out to assign strength metrics

Password Entry Errors: Memory or Motor?

April 9, 2015

Author(s)

Kristen Greene, Frank Tamborello

As we increasingly rely upon our computer information systems to store and operate on sensitive information, the methods we use to authenticate user identity also become more important. One of the most important such methods is the password. However

ACT-R Modeling of Password Entry Errors

April 2, 2015

Author(s)

Kristen Greene, Franklin Tamborello

Validated predictive models of human error for password-related tasks could better inform password requirements for both government and civilian systems. Here, we build upon prior modeling work focused on disentangling the source of password entry errors

Electrodermal Activity and Eye Movements Inform the Usability of Passwords

November 18, 2014

Author(s)

Jennifer R. Bergstrom, Kristen K. Greene, David C. Hawkins, Christian Gonzalez

While measuring physiological responses is a common practice in the field of neuroscience, it is rare in the usability arena and in password usability studies, in particular. This is unfortunate, as the use of such implicit measures could complement more

An ACT-R Model of Elliptical Endpoint Error Distributions in a Mobile Touchscreen 2-D Fitts Law Task

October 14, 2014

Author(s)

Kristen Greene, Melissa A. Gallagher, Franklin Tamborello

Given the high propensity of users motoric errors with smaller touchscreen usa-buttons, knowing the endpoint distributions for finger- based pointing and tapping is especially important for higher-fidelity predictive modeling of tasks on such devices. One

Design and Testing of a Mobile Touchscreen Interface for Multi-Modal Biometric Capture

August 1, 2014

Author(s)

Kristen Greene, Ross J. Micheals, Kayee K. Hanaoka, Gregory P. Fiumara

In this report, we describe in detail the design and usability testing of a touchscreen interface for multimodal biometric capture, an application called WSABI, Web Services for the Acquisition of Biometric Information. The application code is publicly

Character Strings, Memory and Passwords: What a Recall Study Can Tell Us.

June 22, 2014

Author(s)

Brian C. Stanton, Kristen Greene

Many users must authenticate to multiple systems and applications, often using different passwords, on a daily basis. At the same time, the recommendations of security experts are driving increases in the required character length and complexity of

Development of a Scale to Assess the Linguistic and Phonological Difficulty of Passwords

June 22, 2014

Author(s)

Jennifer R. Bergstrom, Stefan A. Frisch, David C. Hawkins, Joy Hackenbracht, Kristen K. Greene, Mary Theofanos, Brian Griepentrog

Increasingly, institutions are requiring or recommending that their employees use secure, system-generated passwords. It is not clear how well linguistic and phonological language properties map onto complex, randomly-generated passwords. Passwords

I Can't Type That! P@$$w0rd Entry on Mobile Devices

June 22, 2014

Author(s)

Kristen Greene, Melissa A. Gallagher, Brian C. Stanton, Paul Y. Lee

Given the numerous constraints of onscreen keyboards, such as smaller keys and lack of tactile feedback, remembering and typing long, complex passwords an already burdensome task on desktop computing systems becomes nearly unbearable on small mobile

Support for ACT-R Modeling of Elliptical Endpoint Error Distributions in Mobile Touchscreen 2-D Fitts' Law Tasks

April 1, 2014

Author(s)

Kristen Greene, Melissa A. Gallagher, Franklin Tamborello

Given the high propensity of users motoric errors with smaller touchscreen usa-buttons, knowing the endpoint distributions for finger-based pointing and tapping is especially important for higher-fidelity predictive modeling of tasks on such devices. One