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Center for Education and Research in Information Assurance and Security

Information Flow Security in Practical Systems

Limin Jia

Limin Jia - Carnegie Mellon University

Apr 12, 2017

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Abstract

Users routinely type sensitive data such as passwords, credit card numbers, and even SSN into their mobile phone apps and browsers. Rich functionality combined with weak security mechanisms makes protecting users’ data a challenging. In this talk, I will present a few case studies of applying information flow security to protecting users’ data in Android, the Chromium browser, and the IFTTT framework. For these systems, we show that dynamic coarse-grained taint tracking, even though it allows implicit flows, can be retrofitted into existing systems to defend users’ data from common attacks. I will explain the challenges in striking a balance between preserving key functionality of legacy systems and ensuring formally provable security guarantees and discuss how different modeling techniques affect noninterference proofs.

About the Speaker

Dr. Jia is an Assistant Research Professor in the ECE Department at Carnegie Mellon University. Dr. Jia received her PhD in Computer Science from Princeton University. She received her BE in Computer Science and Engineering from the University of Science and Technology in China. Dr. Jia's research interests are in formal aspects of software security, in particular, applying formal approaches to constructing software systems with known security guarantees.

Unless otherwise noted, the security seminar is held on Wednesdays at 4:30P.M. STEW G52, West Lafayette Campus. More information...

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