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A list of all the posts and pages found on the site. For you robots out there is an XML version available for digesting as well.
Pages
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Posts
Future Blog Post
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Blog Post number 4
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Blog Post number 3
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Blog Post number 2
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Blog Post number 1
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portfolio
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publications
Lost in Transmission: Investigating Filtering of COVID-19 Websites
Published in Financial Cryptography and Data Security (FC) 2021, 2021
After the unprecedented arrival of the COVID-19 pandemic, the Internet has become a crucial source of essential information on the virus. To prevent the spread of misinformation and panic, many authorities have resorted to exercising higher control over Internet resources. Although there is anecdotal evidence that websites containing information about the pandemic are blocked in specific countries, the global extent of these censorship efforts is unknown. In this work, we perform the first global censorship measurement study of websites obtained from search engine queries on COVID-19 information in more than 180 countries.
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Experimental Security Analysis of the App Model in Business Collaboration Platforms
Published in USENIX Security 2022, 2022
Business Collaboration Platforms like Microsoft Teams and Slack enable teamwork by supporting text chatting and third-party resource integration. A user can access online file storage, make video calls, and manage a code repository, all from within the platform, thus making them a hub for sensitive communication and resources. The key enabler for these productivity features is a third-party application model. We contribute an experimental security analysis of this model and the third-party apps. Performing this analysis is challenging because commercial platforms and their apps are closed-source systems. Our analysis methodology is to systematically investigate different types of interactions possible between apps and users. We discover that the access control model in these systems violates two fundamental security principles: least privilege and complete mediation. These violations enable a malicious app to exploit the confidentiality and integrity of user messages and third-party resources connected to the platform. We construct proof-of-concept attacks that can: (1) eavesdrop on user messages without having permission to read those messages; (2) launch fake video calls; (3) automatically merge code into repositories without user approval or involvement. Finally, we provide an analysis of countermeasures that systems like Slack and Microsoft Teams can adopt today.
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Sneaky Spy Devices and Defective Detectors: The Ecosystem of Intimate Partner Surveillance with Covert Devices
Published in USENIX Security 2023, 2023
Recent anecdotal evidence suggests that abusers have begun to use covert spy devices such as nanny cameras, item trackers, and audio recorders to spy on and stalk their partners. Currently, it is difficult to combat this type of intimate partner surveillance (IPS) because we lack an understanding of the prevalence and characteristics of commercial spy devices. Additionally, it is unclear whether existing devices, apps, and tools designed to detect covert devices are effective. We observe that many spy devices and detectors can be found on mainstream retailers. Thus, in this work, we perform a systematic survey of spy devices and detection tools sold through popular US retailers. We gather 2,228 spy devices, 1,313 detection devices, and 51 detection apps, then study a representative sample through qualitative analysis as well as in-lab evaluations. Our results show a bleak picture of the IPS ecosystem. Not only can commercial spy devices easily be used for IPS, but many of them are advertised for use in IPS and other covert surveillance. On the other hand, commercial detection devices and apps are all but defective, and while recent academic detection systems show promise, they require much refinement before they can be useful to survivors. We urge the security community to take action by designing practical, usable detection tools to detect hidden spy devices.
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talks
Talk 1 on Relevant Topic in Your Field
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Conference Proceeding talk 3 on Relevant Topic in Your Field
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This is a description of your conference proceedings talk, note the different field in type. You can put anything in this field.
teaching
Introduction to Information Security (Teaching Assitant)
Undergraduate course, University of Wisonsin-Madison, Computer Science Department, 2021
Worked under Prof. Rahul Chatterjee as a teching assistant for his class Introduction to Information Security.