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Usable Security And Privacy For Secure Messaging Applications, Elham Vaziripour
Usable Security And Privacy For Secure Messaging Applications, Elham Vaziripour
Theses and Dissertations
The threat of government and corporate surveillance around the world, as well as the publicity surrounding major cybersecurity attacks, have increased interest in secure and private end-to-end communications. In response to this demand, numerous secure messaging applications have been developed in recent years. These applications have been welcomed and publically used not just by political activists and journalists but by everyday users as well. Most of these popular secure messaging applications are usable because they hide many of the details of how encryption is provided. The strength of the security properties of these applications relies on the authentication ceremony, wherein …
Usable, Secure Content-Based Encryption On The Web, Scott Ruoti
Usable, Secure Content-Based Encryption On The Web, Scott Ruoti
Theses and Dissertations
Users share private information on the web through a variety of applications, such as email, instant messaging, social media, and document sharing. Unfortunately, recent revelations have shown that not only is users' data at risk from hackers and malicious insiders, but also from government surveillance. This state of affairs motivates the need for users to be able to encrypt their online data.In this dissertation, we explore how to help users encrypt their online data, with a special focus on securing email. First, we explore the design principles that are necessary to create usable, secure email. As part of this exploration, …
User Experience Engineering Adoption And Practice: A Longitudinal Case Study, Brady Edwin Redfearn
User Experience Engineering Adoption And Practice: A Longitudinal Case Study, Brady Edwin Redfearn
Theses and Dissertations
User Experience Engineering (UxE) incorporates subject areas like usability, HCI, interaction experience, interaction design, "human factors", ergonomics", cognitive psychology", behavioral psychology and psychometrics", systems engineering", [and] "computer science," (Hartson, 1998). It has been suggested that UxE will be the main success factor in organizations as we enter the "loyalty decade" of software development, where the repeat usage of a product by a single customer will be the metric of product success (Alghamdi, 2010; Law & van Schaik, 2010, p. 313; Nielsen, 2008; Van Schaik & Ling, 2011). What is relatively unknown in the current academic literature is whether existing UxE …
Face Tracking User Interfaces Using Vision-Based Consumer Devices, Norman Villaroman
Face Tracking User Interfaces Using Vision-Based Consumer Devices, Norman Villaroman
Theses and Dissertations
Some individuals have difficulty using standard hand-manipulated input devices such as a mouse and a keyboard effectively. For such users who at the same time have sufficient control over face and head movement, a robust perceptual or vision-based user interface that can track face movement can significantly help them. Using vision-based consumer devices makes such a user interface readily available and allows its use to be non-intrusive. Designing this type of user interface presents some significant challenges particularly with accuracy and usability. This research investigates such problems and proposes solutions to create a usable and robust face tracking user interface …
Pixel Based Note Taking Through Perceptual Structure Inference, Mitchell Kent Harris
Pixel Based Note Taking Through Perceptual Structure Inference, Mitchell Kent Harris
Theses and Dissertations
Knowledge workers need effective annotation tools to assimilate information. Unfortunately many digital annotators are limited in the range of document that they accept. Those that do accept many different documents do so by converting documents to images, thus losing any awareness about the original content of the document. We introduce a digital note taker that is both universal and content aware. By constructing a hierarchical context tree of document images, the structure of a document is inferred from the image. This hierarchical context tree is shown to be useful by demonstrating how it facilitates selection of document elements, reflowing documents …