NC State University
Computer Science Department Seminars 2006-2007
*** Celebrating the 40th Anniversary in 2007
***
Date: Friday October 27, 2006
Time: 11:00 AM
Place: 3211, EB2; NCSU Centennial Campus (click for courtesy
parking request)
Speaker: Cristina Nita-Rotaru , Purdue University CERIAS & Computer Science Department
Scaling Byzantine Fault-Tolerant Systems to Wide Area Networks
Abstract: During the last few years, there has been considerable progress in the
design of Byzantine tolerant replication systems. The current state of
the art protocols perform very well on small-scale systems that are
usually confined to local area networks. However, current solutions
employ flat architectures that have limited scalability due to
the communication cost and limited availability on WANS due to
strong connectivity requirements.
We present the first hierarchical Byzantine tolerant
replication architecture suitable to systems that span multiple wide
area sites. The architecture confines the effects of any malicious
replica to its local site, reduces message complexity of wide area
communication, and allows read-only queries to be performed locally
within a site for the price of additional hardware. A prototype
implementation is evaluated over several network topologies and is
compared with a flat Byzantine tolerant approach.
Short Bio: Cristina Nita-Rotaru is an Assistant Professor in the Department of Computer Sciences and a member of CERIAS (Center for Education and Research in Information Assurance and Security) at Purdue University. She joined Purdue in 2003, and established the Dependable and Secure Distributed Systems Laboratory (DS^2, http://projects.cerias.purdue.edu/ds2/). She is a recipient of NSF CAREER Award.
Her work is funded by the Center for Education and Research in
Information Security and Assurance (CERIAS), by the Defense Advanced
Research Projects Agency (DARPA), and by the National Science Foundation
(NSF).
Host: Annie I. Anton, Computer Science, NCSU
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