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Denial of Service (DoS) attacks will destroy the communication channels between agents. How to reduce the impact of DoS attacks onsystem consensus of nonlinear multi-agent systems (MASs) with semi-Markov switching (SMS) is an important problem that has ...

SMS-based two-factor authentication (2FA) is the most widely deployed 2FA mechanism, despite the fact that SMS messages are known to be vulnerable to rerouting attacks, and despite the availability of alternatives that may be more secure. This is for ...

Despite the long history of studying instant messaging usage, we know very little about how today's people participate in group chat channels and interact with others inside a real-world organization. In this short paper, we aim to update the existing ...

Participation in out-of-school learning programs has been shown to generate significant academic, social/emotional, and institutional benefits for young learners, and today's wealthy families are disproportionately reaping these benefits. This paper ...

We created a quiz-based intervention to help secondary school students in Cameroon with exam practice. We sent regularly-spaced, multiple-choice questions to students' own mobile devices and examined factors which influenced quiz participation. These ...

Businesses often use mobile text messages (SMS) as a cost effective and universal way of communicating concise information to their customers. Today, these messages are usually sent via SMS brokers, which forward them further to the next stakeholder, ...

Religious institutions hold a significant place in daily life for the vast majority of people in the world, especially in developing countries. Yet despite their social prominence, and despite HCI's emphasis on the social context of technology, ...

Text messaging is used by more people around the world than any other communications technology. As such, it presents a desirable medium for spammers. While this problem has been studied by many researchers over the years, the recent increase in ...

In this paper we argue for the use of Unstructured Supplementary Service Data (USSD) as a platform for universal cell phone applications. We examine over a decade of ICT4D research, analyzing how USSD can extend and complement current uses of IVR and ...

At the peak of the West African Ebola outbreak in December 2014, the only prospect for containing the Ebola Virus Disease (EVD) was through behavior change to reduce transmission pathways. However, deeply ingrained beliefs, social systems, and cultural ...

A growing body of HCI4D research studies the use of SMS communication to deliver health and information services to underserved populations. This paper contributes a novel dimension to this field of study by examining if a hybrid computer-human SMS ...

While microblogging has emerged as an important information sharing and communication platform, it has also become a convenient venue for spammers to overwhelm other users with unwanted content. Currently, spammer detection in microblogging focuses on ...

Email is the primary method of digital communication for most people, but the overwhelming quantity has led to a poverty of attention. Existing manual and automatic solutions that aim to save important emails from falling through the cracks have begun ...

In this paper, we present a study of WhatsApp, an instant messaging smartphone application. Through our interviews with participants, we develop anthopologist Tim Ingold's notion of dwelling, and discuss how use of WhatsApp is constitutive of a felt-...

With the advent of instant mobile messaging applications, traditional SMS is in danger of loosing it's reign as the king of mobile messaging. Applications like WhatsApp allow mobile users to send real-time text messages to individuals or groups of ...

The goal of this study was to extend and replicate an SMS health intervention for pediatric asthma patients. This intervention was designed using the Health Belief Model (HBM). Thirty patients were randomly assigned to one of three conditions. In the ...

In an always-connected world, managing one's unavailability for interaction with others can be as important and difficult as coordinating mutual availability. Prior studies have identified the butler lie, a linguistic strategy commonly used to manage ...

Being a social species, humans sometimes desire to share information and to consume content as part of a group. A myriad of practical issues might however prevent people from physically congregating. The synchronous MediaSharing (sMS) framework attempts ...

In this paper, we present an SMS-based Android botnet. Since all mobile phones have SMS services as a feature, we will use SMS as the medium of propagation of Command and Control messages between the botnet controller and the victim devices. The ...

Mobile SMS spam is on the rise and is a prevalent problem. While recent work has shown that simple machine learning techniques can distinguish between ham and spam with high accuracy, this paper explores the individual contributions of various textual ...