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Search Publications by: Kristen K. Greene (Fed)

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Displaying 26 - 50 of 52

Towards Developing Standardized Usability Evaluation Methodology for Public Safety Communications Technology: A User-Centered Approach

June 14, 2018
Author(s)
Kristen Greene, Shanee T. Dawkins, Yee-Yin Choong, Mary F. Theofanos, Sandra S. Prettyman, Susanne M. Furman, Michelle P. Steves
In public safety and homeland security, it is critical to understand technology users’ primary goals, the characteristics of the users, and the context in which they are operating. New and emerging technologies present opportunities and challenges for

Digital Identity Guidelines: Enrollment and Identity Proofing Requirements [including updates as of 12-01-2017]

December 1, 2017
Author(s)
Paul A. Grassi, Naomi B. Lefkovitz, James L. Fenton, Jamie M. Danker, Yee-Yin Choong, Kristen Greene, Mary F. Theofanos
These guidelines provide technical requirements for federal agencies implementing digital identity services and are not intended to constrain the development or use of standards outside of this purpose. This guideline focuses on the enrollment and

Exploratory Lens Model of Decision-Making in a Potential Phishing Attack Scenario

October 10, 2017
Author(s)
Franklin Tamborello, Kristen K. Greene
Phishing, the transmission of a message spoofing a legitimate sender about a legitimate subject with intent to perform malicious activity, causes a tremendous and rapidly-increasing amount of damage to American information systems and users annually. This

Digital Identity Guidelines: Authentication and Lifecycle Management

June 22, 2017
Author(s)
Paul A. Grassi, Elaine M. Newton, Ray A. Perlner, Andrew R. Regenscheid, William E. Burr, Justin P. Richer, Naomi B. Lefkovitz, Jamie M. Danker, Yee-Yin Choong, Kristen Greene, Mary F. Theofanos
These guidelines provide technical requirements for federal agencies implementing digital identity services and are not intended to constrain the development or use of standards outside of this purpose. These guidelines focus on the authentication of

Digital Identity Guidelines: Enrollment and Identity Proofing Requirements

June 22, 2017
Author(s)
Paul A. Grassi, James L. Fenton, Naomi B. Lefkovitz, Jamie M. Danker, Yee-Yin Choong, Kristen Greene, Mary F. Theofanos
These guidelines provide technical requirements for federal agencies implementing digital identity services and are not intended to constrain the development or use of standards outside of this purpose. This guideline focuses on the enrollment and

Digital Identity Guidelines: Federation and Assertions

June 22, 2017
Author(s)
Paul A. Grassi, Ellen M. Nadeau, Justin P. Richer, Sarah K. Squire, James L. Fenton, Naomi Lefkovitz, Jamie M. Danker, Yee-Yin Choong, Kristen K. Greene
This document and its companion documents, SP 800-63, SP 800-63A, and SP 800-63B, provide technical and procedural guidelines to agencies for the implementation of federated identity systems and for assertions used by federations. This publication

Memory and Motor Processes of Password Entry Error

December 19, 2016
Author(s)
Frank Tamborello, Kristen K. Greene
Passwords are tightly interwoven with the digital fabric of our current society. Unfortunately, passwords that provide better security generally tend to be more complex, both in length and composition. Complex passwords are problematic both cognitively and

Usability and Security Considerations for Public Safety Mobile Authentication

July 27, 2016
Author(s)
Yee-Yin Choong, Joshua M. Franklin, Kristen Greene
There is a need for cybersecurity capabilities and features to protect the Nationwide Public Safety Broadband Network (NPSBN). However, cybersecurity requirements should not compromise the ability of first responders to complete their missions. In addition

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 platforms—desktop, smartphone, and tablet—using system- generated passwords that adhere to the stricter password requirements found in higher-security enterprise environments. This research

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

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

ACT-Touch Reference Manual, Working Draft

August 15, 2013
Author(s)
Kristen Greene, Franklin Tamborello
ACT-Touch is a set of manual motor request extensions for ACT-R 6 (Adaptive Control of Thought-Rational, hereafter, ACT-R) . These manual request extensions constitute theoretical claims predicting motor preparation and execution times for certain manual