Foundations for Parallel Information Flow Control Runtime Systems
We present the foundations for a new dynamic information flow control (IFC) parallel runtime system, LIOPAR. To our knowledge, LIOPAR is the first dynamic language-level IFC system to (1) support parallel thread execution and (2) eliminate both internal- and external-timing covert channels that exploit the runtime system. Most existing IFC systems are vulnerable to external timing attacks because they are built atop vanilla runtime systems that do not account for security—these runtime systems allocate and reclaim shared resources, e.g., CPU-time and memory, fairly between threads at different security levels. While such attacks have largely been ignored—or, at best, mitigated—we demonstrate that extending IFC systems with parallelism leads to the internalization of these attacks. Our IFC runtime system design addresses these concerns by hiearchically managing resources— both CPU-time and memory—and making resource allocation and reclamation explicit at the language-level. We prove that LIOPAR is secure, i.e., it satisfies progress-and-time sensitive non-interference, even when exposing clock and heap-statistics APIs.
Thu 11 AprDisplayed time zone: Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna change
10:30 - 12:30 | |||
10:30 30mTalk | Foundations for Parallel Information Flow Control Runtime Systems POST Marco Vassena Chalmers University of Technology, Gary Soeller , Peter Amidon , Matthew Chan , John Renner University of California, San Diego, Deian Stefan University of California San Diego Link to publication | ||
11:00 30mTalk | A Formal Analysis of Timing Channel Security via Bucketing POST Link to publication | ||
11:30 30mTalk | A Dependently Typed Library for Static Information-Flow Control in Idris POST Simon Oddershede Gregersen Aarhus University, Søren Eller Thomsen Aarhus University, Aslan Askarov Aarhus University Link to publication | ||
12:00 30mTalk | Achieving Safety Incrementally with Checked C POST Andrew Ruef , Leonidas Lampropoulos University of Pennsylvania, Ian Sweet , David Tarditi , Michael Hicks University of Maryland, College Park Link to publication |