SECURITY AND USER EXPERIENCE: A HOLISTIC MODEL FOR CAPTCHA USABILITY ISSUES

CAPTCHA is a widely adopted security measure in the Web, and is designed to effectively distinguish humans and bots by exploiting human’s ability to recognize patterns that an automated bot is incapable of. To counter this, bots are being designed to recognize patterns in CAPTCHAs. As a result, CAPTCHAs are now being designed to maximize the difficulty for bots to pass human interaction proof tests, while making it quite an arduous task even for humans as well. The approachability of CAPTCHA is increasingly being questioned because of the inconvenience it causes to legitimate users. Irrespective of the popularity, CAPTCHA is indispensable if one wants to avoid potential security threats. We investigated the usability issues associated with CAPTCHA. We built a holistic model by identifying the important concepts associated with CAPTCHAs and its usability. This model can be used as a guide for the design and evaluation of CAPTCHAs

Web accessibility and mental disorders

Background: Mental disorders are a significant public health issue due to the restrictions they place on participation in all areas of life and the resulting disruption to the families and societies of those affected. People with these disorders often use the Web as an informational resource, platform for convenient self-directed treatment and a means for many other kinds of support. However, some features of the Web can potentially erect barriers for this group that limit their access to these benefits, and there is a lack of research looking into this eventuality. Therefore, it is important to identify gaps in knowledge about “what” barriers exist and “how” they could be addressed so that this knowledge can inform Web professionals who aim to ensure the Web is inclusive to this population. Objective: The objective of this work was to identify the barriers people with mental disorders, especially those with depression and anxiety, experience when using the Web and the facilitation measures used to address such barriers. Methods: This work involved three studies. First, (1) a systematic review of studies that have considered the difficulties people with mental disorders experience when using digital technologies. A synthesis was performed by categorizing data according to the 4 foundational principles of Web accessibility as proposed by the World Wide Web Consortium. Facilitation measures recommended by studies were later summarized into a set of minimal recommendations. This work also relied data triangulation using (2) face-to-face semistructured interview study with participants affected by depression and anxiety and a comparison group, as well as (3) a persona-based expert online survey study with mental health practitioners. Framework analysis was used for study 2 and study 3. Results: A total of 16 publications were included in study 1’s review, comprising 13 studies and 3 international guidelines. Findings suggest that people with mental disorders experience barriers that limit how they perceive, understand, and operate websites. Identified facilitation measures target these barriers in addition to ensuring that Web content can be reliably interpreted by a wide range of user applications. In study 2, 167 difficulties were identified from the experiences of participants in the depression and anxiety group were discussed within the context of 81 Web activities, services, and features. Sixteen difficulties identified from the experiences of participants in the comparison group were discussed within the context of 11 Web activities, services, and features. In study 3, researchers identified 3 themes and 10 subthemes that described the likely difficulties people with depression and anxiety might experience online as reported by mental health practitioners. Conclusions: People with mental disorders encounter barriers on the Web, and attempts have been made to remove or reduce these barriers. This investigation has contributed to a fuller understanding of these difficulties and provides innovative guidance on how to remove and reduce them for people with depression and anxiety when using the Web. More rigorous research is still needed to be exhaustive and to have a larger impact on improving the Web for people with mental disorders

How WEIRD is Usable Privacy and Security Research? (Extended Version)

In human factor fields such as human-computer interaction (HCI) and psychology, researchers have been concerned that participants mostly come from WEIRD (Western, Educated, Industrialized, Rich, and Democratic) countries. This WEIRD skew may hinder understanding of diverse populations and their cultural differences. The usable privacy and security (UPS) field has inherited many research methodologies from research on human factor fields. We conducted a literature review to understand the extent to which participant samples in UPS papers were from WEIRD countries and the characteristics of the methodologies and research topics in each user study recruiting Western or non-Western participants. We found that the skew toward WEIRD countries in UPS is greater than that in HCI. Geographic and linguistic barriers in the study methods and recruitment methods may cause researchers to conduct user studies locally. In addition, many papers did not report participant demographics, which could hinder the replication of the reported studies, leading to low reproducibility. To improve geographic diversity, we provide the suggestions including facilitate replication studies, address geographic and linguistic issues of study/recruitment methods, and facilitate research on the topics for non-WEIRD populations.Comment: This paper is the extended version of the paper presented at USENIX SECURITY 202

Role of images on World Wide Web readability

As the Internet and World Wide Web have grown, many good things have come. If you have access to a computer, you can find a lot of information quickly and easily. Electronic devices can store and retrieve vast amounts of data in seconds. You no longer have to leave your house to get products and services you could only get in person. Documents can be changed from English to Urdu or from text to speech almost instantly, making it easy for people from different cultures and with different abilities to talk to each other. As technology improves, web developers and website visitors want more animation, colour, and technology. As computers get faster at processing images and other graphics, web developers use them more and more. Users who can see colour, pictures, animation, and images can help understand and read the Web and improve the Web experience. People who have trouble reading or whose first language is not used on the website can also benefit from using pictures. But not all images help people understand and read the text they go with. For example, images just for decoration or picked by the people who made the website should not be used. Also, different factors could affect how easy it is to read graphical content, such as a low image resolution, a bad aspect ratio, a bad colour combination in the image itself, a small font size, etc., and the WCAG gave different rules for each of these problems. The rules suggest using alternative text, the right combination of colours, low contrast, and a higher resolution. But one of the biggest problems is that images that don't go with the text on a web page can make it hard to read the text. On the other hand, relevant pictures could make the page easier to read. A method has been suggested to figure out how relevant the images on websites are from the point of view of web readability. This method combines different ways to get information from images by using Cloud Vision API and Optical Character Recognition (OCR), and reading text from websites to find relevancy between them. Techniques for preprocessing data have been used on the information that has been extracted. Natural Language Processing (NLP) technique has been used to determine what images and text on a web page have to do with each other. This tool looks at fifty educational websites' pictures and assesses their relevance. Results show that images that have nothing to do with the page's content and images that aren't very good cause lower relevancy scores. A user study was done to evaluate the hypothesis that the relevant images could enhance web readability based on two evaluations: the evaluation of the 1024 end users of the page and the heuristic evaluation, which was done by 32 experts in accessibility. The user study was done with questions about what the user knows, how they feel, and what they can do. The results back up the idea that images that are relevant to the page make it easier to read. This method will help web designers make pages easier to read by looking at only the essential parts of a page and not relying on their judgment.Programa de Doctorado en Ciencia y Tecnología Informática por la Universidad Carlos III de MadridPresidente: José Luis Lépez Cuadrado.- Secretario: Divakar Yadav.- Vocal: Arti Jai

Getting the Word Out: A Study of Assistance Information Made Available to Low-Income People through County Websites

Electronic government (e-government) is vetted as a mechanism to deliver government information and services to the public with efficiency, cost-effectiveness, and greater democratization. The impacts to low-income people can be significant but the topic remains largely unexplored by research. This new study establishes a research agenda to examine the social impacts (rather than the technology focus) of that space wherein assistance information is deployed digitally and a low-income person seeks and retrieves it. This dissertation examines how information about Medicaid, Supplemental Nutrition Assistance Program ("food stamps), and Temporary Assistance to Needy Families ("welfare") are delivered electronically. Case studies of three Maryland counties 1) examine information to understand what is made available on-line, 2) examine the state and county statutes, strategies, and policies issued on-line to understand expectations, requirements, and implementation decisions, and 3) compare implementations and alignment with statutory mandates. The research identified commonalities and gaps between the mandates and implementation. In particular, state statutes support delivering services and information digitally across multiple platforms. This is being implemented for some county services but notably, not for assistance services for low-income people. This obviates opportunities to reduce the stigma, effort, and costs in applying for services and for realizing greater efficiency in assistance delivery by Departments of Social Services. This gap perpetuates low-income people as a "separate but unequal" class, making this a question of civil rights, and issues of income and full-realized citizenship. This exploratory research provides a new lens through which to expand current information theory models such as information poverty, small worlds, and digital inclusion. It can help identify mechanisms to address. This research can help policymakers to address the intersection of technology; changes in demographics, technology access, and literacy; income; citizenship; biases designed into automation; and organization efficiency. Finally, it can help inform a practical framework with which counties can determine how closely program information and delivery meet public needs and evaluate the impacts of e-government

Human Computer Interaction and Emerging Technologies

The INTERACT Conferences are an important platform for researchers and practitioners in the field of human-computer interaction (HCI) to showcase their work. They are organised biennially by the International Federation for Information Processing (IFIP) Technical Committee on Human–Computer Interaction (IFIP TC13), an international committee of 30 member national societies and nine Working Groups. INTERACT is truly international in its spirit and has attracted researchers from several countries and cultures. With an emphasis on inclusiveness, it works to lower the barriers that prevent people in developing countries from participating in conferences. As a multidisciplinary field, HCI requires interaction and discussion among diverse people with different interests and backgrounds. The 17th IFIP TC13 International Conference on Human-Computer Interaction (INTERACT 2019) took place during 2-6 September 2019 in Paphos, Cyprus. The conference was held at the Coral Beach Hotel Resort, and was co-sponsored by the Cyprus University of Technology and Tallinn University, in cooperation with ACM and ACM SIGCHI. This volume contains the Adjunct Proceedings to the 17th INTERACT Conference, comprising a series of selected papers from workshops, the Student Design Consortium and the Doctoral Consortium. The volume follows the INTERACT conference tradition of submitting adjunct papers after the main publication deadline, to be published by a University Press with a connection to the conference itself. In this case, both the Adjunct Proceedings Chair of the conference, Dr Usashi Chatterjee, and the lead Editor of this volume, Dr Fernando Loizides, work at Cardiff University which is the home of Cardiff University Press

Risk, Trust and Emergent Groups: COVID-19 Mutual Aid Networks

Throughout the world, thousands of local mutual aid networks (MANs) have emerged in response to the COVID-19 pandemic. Mutual aid involves exchanging resources, connecting people to services and building community. During the COVID-19 pandemic, mutual aid includes sharing COVID-19 information, social support, food and emergency funds in informal local networks. To learn more about these community networks and explore the perspectives and experiences of MAN participants around the United States, I conducted survey research. There are 101 individuals from 16 MANs in 11 states included in the survey sample. There are two parts to this research. The first explores descriptive characteristics of MAN participants and their network involvement. The survey results describe demographic characteristics of MAN participant demographic characteristics, types of MAN involvement and motivations for joining MANs. The second part of this research analyzes social trust, institutional trust and COVID-19 risk perception. Survey findings suggest that MAN participants have high social trust, high institutional trust and low COVID-19 risk perception when compared to overall U.S. population survey data (Dryhurst et al. 2020; NORC1 N.d.). Results from this research provide insight on local community networks that develop in the midst of crises and contribute to a growing body of COVID-19 mutual aid research

Transnationalizing Radio Research: New Approaches to an Old Medium

Transnationalizing Radio Research presents a theoretical and methodological guide for exploring radio's multiple »global ages«, from its earliest years through its recent digital transformations. It offers radio scholars theoretical tools and concrete case studies for moving beyond national research frames. It gives radio practitioners inspiration for production and archiving, and offers scholars from many disciplines new ways to incorporate radio's vital voices into work on transnational institutions, communities, histories and identities

AN ENHANCEMENT ON TARGETED PHISHING ATTACKS IN THE STATE OF QATAR

The latest report by Kaspersky on Spam and Phishing, listed Qatar as one of the top 10 countries by percentage of email phishing and targeted phishing attacks. Since the Qatari economy has grown exponentially and become increasingly global in nature, email phishing and targeted phishing attacks have the capacity to be devastating to the Qatari economy, yet there are no adequate measures put in place such as awareness training programmes to minimise these threats to the state of Qatar. Therefore, this research aims to explore targeted attacks in specific organisations in the state of Qatar by presenting a new technique to prevent targeted attacks. This novel enterprise-wide email phishing detection system has been used by organisations and individuals not only in the state of Qatar but also in organisations in the UK. This detection system is based on domain names by which attackers carefully register domain names which victims trust. The results show that this detection system has proven its ability to reduce email phishing attacks. Moreover, it aims to develop email phishing awareness training techniques specifically designed for the state of Qatar to complement the presented technique in order to increase email phishing awareness, focused on targeted attacks and the content, and reduce the impact of phishing email attacks. This research was carried out by developing an interactive email phishing awareness training website that has been tested by organisations in the state of Qatar. The results of this training programme proved to get effective results by training users on how to spot email phishing and targeted attacks