Privacy Lab

Tousif Ahmed has received the prestigious 2023 John Karat Usable Privacy and Security Student Research Award for his work on privacy for people with visual impairments! The Karat award was made at the opening of SOUPS and we are all proud of Tousif! Read more about it in our 现在怎么去国外网站.

Here are three selected articles related to his dissertation:

UbiComp ’18: Up to a Limit? Privacy Concerns of Bystanders and Their Willingness to Share Additional Information with Visually Impaired Users of Assistive Technologies
SOUPS ’16: Addressing Physical Safety, Security, and Privacy for People with Visual Impairments
CHI ’15: Privacy Concerns and Behaviors of People with Visual Impairments

Apu Kapadia gave the keynote talk at the Midwest Security Workshop (2023) titled “For the People: (Human) Factors to Consider in Security and Privacy Research.”

Talk Abstract: In this talk, I will make a case for considering human factors in your research. Although not all of us may ‘need’ to run user studies, your research could benefit from a deeper understanding of what to build, what not to build, why to build it, and how people might benefit from your inventions. Many of you may be reticent to enter this space of ‘usable security’ – I hope to demystify some of the methods by weaving in a narrative of my explorations on privacy in the context of wearable cameras. It is my hope this talk will inspire some of you to factor in the human because, in the end, we are securing systems for the people, attacked by the people.

Rakib Hasan won the Best Poster Award at the Midwest Security Workshop (2023) for his work on “Automatically Detecting Bystanders in Images to Reduce Privacy Violations”!

Pervasive photo sharing in online social media platforms can cause unintended privacy violations when elements of an image reveal sensitive information. Prior studies have identified image obfuscation methods (e.g., blurring) to enhance privacy, but many of these methods adversely affect viewers’ satisfaction with the photo, which may cause people to avoid using them. We study the novel hypothesis that it may be possible to restore viewers’ satisfaction by ‘boosting’ or enhancing the aesthetics of an obscured image, thereby compensating for the negative effects of a privacy transform. Using a between-subjects online experiment, we studied the effects of three artistic transformations on images that had objects obscured using three popular obfuscation methods validated by prior research. Our findings suggest that using artistic transformations can mitigate some negative effects of obfuscation methods, but more exploration is needed to retain viewer satisfaction.

Read more about it in our CHI 2023 paper.

High-fidelity, and often privacy-invasive, sensors are now becoming pervasive in our everyday environments. At home, digital assistants can constantly listen for instructions and security cameras can be on the lookout for unusual activity. Whereas once an individual’s physical actions, in their own home, were private, now networked cameras and microphones can give rise to electronic privacy concerns for one’s physical behaviors. Casual conversations and encounters, once thought to be private and ephemeral, now may be captured and disseminated or archived digitally. While these sensing devices benefit the users in many different ways, hence their popularity, their users may face serious privacy violations. A major problem with current sensing devices is that it is oftentimes unclear whether an audio or video sensor is, indeed, off upon visual inspection by occupants of a space. For example, sensors that have been hacked may indeed record people without their consent, even when their interfaces (e.g., small indicator lights) claim that they are off. The goal of this project is to explore privacy-enhanced sensor designs that provide people with the knowledge and assurance of when they are being recorded and what data is being captured and disseminated. Whereas purely software mechanisms may not inspire trust, physical mechanisms (e.g., a camera’s physical lens cap) can provide a more tangible privacy guarantee to people. This project explores novel, physical designs of sensors that convey a clear and definite sense of assurance to people about their physical privacy.

Through a collaboration with University of Pittsburgh professors Rosta Farzan and Adam J. Lee, this project brings together expertise in computer security and privacy, access control, human computer interaction, and social computing. Through this interdisciplinary team, the project makes socio-technical contributions to both theory and practice by: (1) understanding the privacy concerns, needs, and behaviors of people in the face of increased sensing in physical environments; (2) exploring the design space for hardware sensing platforms to convey meaningful (‘tangible’) assurances of privacy to people by their physical appearance and function; (3) exploring visual indicators of what information is being sent over the network; and (4) exploring alternative sensor designs that trade off sensing fidelity for higher privacy. Together these designs combine hardware and software techniques to tangibly and visually convey a sense of privacy to people impacted by the sensors.

With the rise of digital photography and social networking, people are capturing and sharing photos on social media at an unprecedented rate. Such sharing may lead to privacy concerns for the people captured in such photos, e.g., in the context of embarrassing photos that go “viral” and are shared widely. At worst, online photo sharing can result in cyber-bullying that can greatly affect the subjects of such photos. This research builds on the observation that viewers of a photo are mindful of the privacy of other people, and could be influenced to protect their privacy when sharing photos online. First, the research will study how people think and feel about sharing photos of themselves and others. This will involve measuring their behavioral and physiological responses as they make their decisions. Second, the research will identify to what degree these decisions can be altered through technical mechanisms that are designed to encourage responsible image sharing activity that respects the privacy of people captured in the photo. The investigators will involve graduate and undergraduates students in this research.

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A critical element for a successful transition is the ability to disclose, or make known, one’s struggles. In our paper ‘Challenges in Transitioning from Civil to Military Culture: Hyper-Selective Disclosure through ICTs’ we explore the transition disclosure practices of Reserve Officers’ Training Corps (ROTC) students who are transitioning from an individualistic culture to one that is highly collective. As ROTC students routinely evaluate their peers through a ranking system, the act of disclosure may impact a student’s ability to secure limited opportunities within the military upon graduation. We perform interviews of 14 ROTC students studying how they use information communication technologies (ICTs) to disclose their struggles in a hyper-competitive environment, we find they engage in a process of highly selective disclosure, choosing different groups with which to disclose based on the types of issues they face. We share implications for designing ICTs that better facilitate how ROTC students cope with personal challenges during their formative transition into the military.

Read more in our CSCW 2018 paper.