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Call No.	Ph.D. 2008
Author	Masone, Christopher P.
Title	Attribute-based, usefully secure email.
Date	2008
Abstract	A secure system that cannot be used by real users to secure real-world processes is not really secure at all. While many believe that usability and security are diametrically opposed, a growing body of research from the field of Human-Computer Interaction and Security (HCISEC) refutes this assumption. All researchers in this field agree that focusing on aligning usability and security goals can enable the design of systems that will be more secure under actual usage. We bring to bear tools from the social sciences (economics, sociology, psychology, etc.) not only to help us better understand why deployed systems fail, but also to enable us to accurately characterize the problems that we must solve in order to build systems that will be secure in the real world. Trust, a critically important facet of any socio-technical secure system, is ripe for analysis using the tools provided for us by the social sciences. There are a variety of scopes in which issues of trust in secure systems can be studied. We have chosen to focus on how humans decide to trust new correspondents. Current secure email systems--such as S/MIME and PGP/MIME--are not expressive enough to capture the real ways that trust flows in these sorts of scenarios. To solve this problem, we begin by applying concepts from social science research to a variety of such cases from interesting application domains; primarily, crisis management in the North American power grid. We have examined transcripts of telephone calls made between grid management personnel during the August 2003 North American blackout and extracted several different classes of trust flows from these real-world scenarios. Combining this knowledge with some design patterns from HCISEC, we develop criteria for a system that will enable humans apply these same methods of trust-building in the digital world. We then present Attribute-Based, Usefully Secure Email (ABUSE) and not only show that it meets our criteria, but also provide empirical evidence that real users are helped by the system.
Description	xi, 205 leaves : ill. 28 cm.
Format	application/pdf
Advisor	Sean W. Smith
Subject	Electronic mail systems -- Security measures. Electronic mail systems -- Social aspects. Trust.
College	Dartmouth College -- Department of Computer Science.
Issuing Body	Dartmouth Dissertations are made available through the Dartmouth Digital Library.
Degree	Thesis (Ph.D.)--Dartmouth College.
Copyright	All rights reserved. No part of this book may be reproduced in any form by any electronic or mechanical means without permission in writing from the author.
DOI	http://dx.doi.org/10.1349/ddlp.231

Title	Page 1
Format	application/pdf
Issuing Body	Dartmouth Dissertations are made available through the Dartmouth Digital Library.
Degree	Thesis (Ph.D.)--Dartmouth College.
Full Text	Attribute-Based, Usefully Secure Email A Thesis Submitted to the Faculty in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Computer Science by Christopher P. Masone DARTMOUTH COLLEGE Hanover, New Hampshire August, 2008 Examining Committee: (chair) Sean W. Smith, Ph.D. David F. Kotz, Ph.D. Christopher J. Bailey-Kellogg, Ph.D. Denise L. Anthony, Ph.D. M. Angela Sasse, Ph.D. Charles K. Barlowe, PhD Dean of Graduate Studies

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