[Jan 2023] My keynote at Comsnets. [ YouTube ]
[Oct-Nov 2022] A set of invited talks and keynotes coming up --- UC Irvine, ISSRE, Middleware, Comsnets.
[Aug 2022] Welcome to 4 new researchers to DCSL. [ WWW ]
[Jul 2022] Our book "System Dependability and Analytics" is released. [ WWW ]
[Oct-Nov 2022] A set of invited talks and keynotes coming up --- UC Irvine, ISSRE, Middleware, Comsnets.
[Aug 2022] Welcome to 4 new researchers to DCSL. [ WWW ]
[Jul 2022] Our book "System Dependability and Analytics" is released. [ WWW ]
[May 2022] Papers accepted in Spring to Eurosys, S&P, Sigmetrics, OSDI, CVPR, ... [ WWW ]
[Jan 2022] I started my three year tenure on the IEEE Computer Society Board of Governors. [ WWW ]
[Nov 2021] My class "Big data for Reliability and Security" is available on edX. [ WWW ]
[Feb 2021] Our NSF CPS project on secure agro analytics starts. [ PDF ]
[Aug 2021] Welcome to 6 new researchers to DCSL. [ WWW ]
[May 2021] I am honored to receive the Adobe Faculty Award and the Amazon Research Award.
[Aug 2020] Our proposal to be part of the Army Research Lab's A2I2 Institute on assured autonomy gets funded. This is joint between Purdue and Princeton over 5 years. [ WWW ]
[Jul 2020] I am honored to be chosen a member of the International Federation for Information Processing (IFIP). I will be in the working group on dependable computing and fault tolerance. [ WWW ]
[Feb-Jun 2020] Our work on streaming apps to phones reliably gets some popular press and an EWSN paper. [ Paper ] [ Purdue news story ] [ WWW ] [ Inside Indiana Business ]
[May-Jun 2020] Two vision papers accepted: resilience in autonomous systems and IoT [ WWW ]
[Apr 2020] Papers accepted in Spring to DSN, Usenix ATC, Mobisys, ... [ WWW ]
[Apr 2020] Five areas of DCSL's research impact over the years. [ WWW ]
[Nov 2019] Our one credit class on "Big data for reliability and security" is going online in Spring 2020 and will be available as part of ECE's Online Masters through edX. [ PDF ]
[Aug 2019] Two of our projects on security in autonomous operations of the battlefield are taking off with funding from Northrop Grumman. These are joint with David Inouye and Chris Brinton, both of Purdue ECE. [ PDF ]
[Aug 2019] My tutorial on "Big Data for Security and Reliability" is now online, with video and slides. I delivered this during the Industry Day of our WHIN center. [ WWW ]
[May 2019] I have stepped into the role of a thrust lead for our $18M WHIN center. I am leading the "IoT and Data Analytics" thrust, one of three in the center. [ WWW ]
[Feb 2019] I am honored to receive the College of Engineering Faculty Excellence Award for Graduate Student Mentorship. A single faculty from the college is recognized each year. [ WWW ]
[May 2019] We wrote up a Medium post on the state of reliability and security of wearable devices and what we are doing about it. [ WWW ]
[Jan 2019] I spoke at an interesting panel at COMSNETS in Bangalore on "Man versus Machine: Humans Need Not Apply". The video is here. [ WWW ]
[Dec 2018] The computer systems research community got together in an NSF-sponsored grand challenges workshop at ASPLOS in Williamsburg, VA. Our report on the current challenges and the road ahead is out now. [ PDF ]
[Sep 2018] Our lightning talk on cyber resilience is now online. [ Presentation (Powerpoint) ] [ Video ]
[Apr 2018] I have been awarded the Humboldt Bessel Research Award. The international award is given to about 20 researchers from all academic disciplines each year by Germany's Alexander von Humboldt Foundation. The award recognizes researchers who have made significant discoveries that have influenced their fields, and who are expected to continue producing such advances in the future. Thanks to my collaborator Christof Fetzer from TU Dresden. [ WWW ]
[April-May 2018] We have new papers on security of IoT devices (Usenix Security '18), approximate video processing (Usenix ATC '18), dependability in the edge (NSF Workshop on Grand Challenges in Computer Systems Research), and dependability in wearable devices (DSN '18). [ WWW ]
[April 2018] The video of the panel with Bob Kahn on "The Internet's Present and Future: Technology and Policy Grand Challenges" is now online. [ WWW ]
[January 2018] A large new project worth $39M and slated for 5 years starts. The project, funded by Lilly Endowment, will develop IoT systems to enable smart agriculture and smart manufacturing. DCSL researchers, Saurabh, Edgardo, and Heng, will be leading the charge on building a reliable wireless mesh network, data analytics to detect failing sensor nodes, and visualization of the data and the network status. [ WWW ]
[January 2018] Want to work on leading-edge Department of Energy accelerator-based systems? Here is an RA announcement on a project on error detection for GPUs using Machine Learning. We plan to finalize the position hire by mid February. Update: Position is filled (2/18). [ WWW ]
[November 2017] Our work on security and game theory for interdependent systems is highlighted in a Purdue news story. [ WWW ] And a Sandia news item. [ PDF ]
[September 2017] Two new funded projects start on security of interdependent systems, one from NSF SaTC and the other from Sandia. [ Details ]
[September 2017] 5 students graduate, 4 new students start in DCSL. [ Details ]
[September 2017] Want to work in graduate school with a great bunch of faculty and students working on different aspects of computer systems? Consider applying to the Computer Engineering program within ECE. [ Details ]
[August 2017] I am teaching the graduate level class on "Fault-tolerant Computer System Design" as a cross-listed class between ECE and CS. [ Details ]
[July 2017] Two papers on our NIH project on computational infrastructure for the largest metagenomics portal in the world, MG-RAST, are accepted in Briefings in Bioinformatics. [ html ]
[June 2017] IFIP Working Group 10.4 on Dependable Computing and Fault Tolerance had a workshop on "Dependable News" in Longmont, Colorado. Here is all our material from that workshop, including an interactive survey on what you find check-worthy in political statements. [ Presentation (Powerpoint) ] [ Quiz ] [ Survey link ] [ Answers for survey ] [ Paper ]
[February 2017] Our paper on security in bare-metal embedded systems is accepted to Oakland '17.
"Protecting Bare-metal Embedded Systems with Privilege Overlays" Abraham A Clements, Naif Saleh Almakhdhub, Khaled Saab, Prashast Srivastava, Jinkyu Koo, Saurabh Bagchi, and Mathias Payer. In Proceedings of the IEEE International Symposium on Security and Privacy (Oakland), 2017. (Acceptance rate: 60/450 = 13.3%) [ Paper ] [ Slides ] [ Video ]
[October 2016] I am honored to have been elected to the IEEE Computer Society Board of Governors, for a 3-year term starting 2017. Here is the Purdue news story. [ html ]
[October 2016] We received the VURI award from AT&T Labs Research, for our collaborative work on diagnosis and repair of QoS issues in their multi-tenant cloud environments. Here is the Purdue news story. [ html ]
[Summer 2016] A paper in Eurosys (our work with AT&T Labs on data recovery in data centers) [ pdf ], one in ICS (our work on a domain specific language for computational genomics) [ pdf ], and two papers in SRDS - one on our joint work with Georgia Tech and AT&T Labs on predictive analytics in cellular networks [ pdf ] and the other on machine learning for detecting silent data corruptions in parallel programs [ pdf ].
[August 2016] I am teaching the graduate-level course titled "Fault-tolerant Computer System Design" which is cross-listed in CS (CS 590FTC) and ECE (ECE 69500). This course is suitable for any starting graduate student in CS or Computer Engineering. [ Course web page ]
[May-Aug 2016] Three DCSL-ers graduate - Paul Wood (PhD, startup), Ravi Gupta (MS, Intel) and Suhas Javagal (MS, Oracle). We welcome a new Research Scientist - Jinkyu Koo, from Samsung Electronics.
[November 18, 2015] We organized a Bird-of-Feather session at the Supercomputing conference in Austin, TX on the topic of our recent NSF project on the open data repository for system usage and failure data. The other organizers were Carol Song (Purdue), Ravi Iyer and Zbigniew Kalbarczyk (UIUC), and Nathan DeBardeleben (Los Alamos National Lab). I have now posted a report for this BoF session. [ html ]
[October 2015] My keynote talk at 34th IEEE Symposium on Reliable Distributed Systems (SRDS) on September 28, 2015 was titled "Dependability in a Connected World: Research in Action in the Operational Trenches."" The slides and the audio recording (in Webex format) are now available. [ Slides ] [ Audio recording ]
[October 8, 2015] I gave a talk to the incoming ECE undergraduate sophomores about why they should all become Computer Engineers. Here is the presentation and the recording for it. [ Powerpoint ] [ MPEG recording ]
[September 10, 2015] Our paper wins the best paper award at ACM BCB, being held at Georgia Tech September 10-12. There were 48 papers, accepted out of 141 submissions. The paper is on developing a distributed classifier for micro RNAs affecting gene expression. Here is the paper and here is the picture. [ pdf ] [ pic ]
[August, 2015] In Fall, I am teaching the graduate course on fault-tolerant computer system design - ECE 695B/CS 590FTC. If you are a graduate student in ECE or CS looking for a hands-on project-based course that also satisfies your POS requirement, consider taking this course. Here is the web page for the course. [ Web page for class ]
[June 2, 2015] We are looking for a research scientist with background in simulation and optimization to start on our recent Purdue-GE Center. [ Announcement (pdf) ]
[April 13, 2015] We are looking for a post-doctoral researcher in practical distributed systems to start on a recently funded NSF project, from July 15, 2015. [ Announcement ]
[February 2015] DCSL research overview gets an update with the latest results and unveiling of the problems that we are working on. [ html ] [ pdf ]
[February 2015] Our paper on software-only exact record and replay for embedded wireless nodes is accepted in IPSN. This shows how one can use software-only to record all sources of non-determinism, compress them in a domain-specific manner, and create a trace that allows for perfect record and replay. [ pdf ]
[February 2015] We get a Google Faculty Award for our work on detection of spurious messages on social networking sites. This award is jointly with Prof. Alex Quinn also of ECE. Here are the details. [ html ].
[January 2015] Our paper is accepted to appear in Communications of the ACM (CACM). It provides an overview and open research problems in debugging in the very large. It is co-authored with colleagues from LLNL, Ohio State, and of course Purdue. [ pdf ]
[March 11, 2015] Here is our presentation to Duke Energy given at the Energy Center at Purdue. [ pptx ].
[Aug 15, 2014] We are looking for two graduate research assistants, starting this Fall, for an NSF-funded and a Department of Energy-funded project. [ Announcement ] Update: These positions have been filled.
[Aug 2014] I am teaching an exciting, practical computer systems course titled "Fault-tolerant Computer System Design" this Fall. Come and check it out. [ Course web page ]
[June 2014] We have two proposals to the National Science Foundation accepted. The first is from the Computational Research Infrastructure (CRI) program and is titled "Computer System Failure Data Repository to Enable Data-Driven Dependability Research" (jointly with Carol Song of Purdue). The second is from the NeTS program and is titled "Tango: Performance and Fault Management in Cellular Networks through Device-Network Cooperation" (jointly with Alan Qi at Purdue, Mostafa Ammar at Georgia Tech, and Kaustubh Joshi and Rajesh Panta at AT&T Labs).
[June 2014] Our paper to Supercomputing on parallelizing genome alignment is accepted. This is work done under our NSF XPS award from September 2013. The paper is here. [ pdf ] And the open source release is here. [ html ]
[Feb 2014] We have papers accepted at PLDI (debugging hangs and performance slowdowns in parallel programs), DSN (zero-day SQL injection attack detection), and TPDS (performance debugging in large-scale programs, extension of our PACT 12 paper). All these papers are available from our group's publications page. [ html ]
Update: We have released an open source implementation of our PLDI paper system. It also includes the implementation of our earlier PACT '12 paper, integrated into one system, which we call AutomaDeD. The github repository is at: https://github.com/scalability-llnl/AutomaDeD
[November 20, 2013] I am honored to be named an ACM Distinguished Scientist. ACM named 40 Distinguished Members this year. My citation reads "for laying the software basis for designing distributed systems that can tolerate faults under a variety of operating conditions." The ACM news story can be found at the following URL. [ html ]
[September 6, 2013] We are looking for a post-doctoral research associate with systems building skills in distributed systems. [ html ] This position has been filled.
[August 2013] DCSL gets two new research awards - one from the National Science Foundation for making computational genomics applications scalable and the second from Northrop Grumman for making their distributed systems that are used for military mission planning secure. [ NSF grant ] [ Northrop Grumman grant ]
[April 8, 2013] The powers-that-be (aka Board of Trustees) entrust me with the awesome responsibility of being a full professor. [ Purdue news story ] [ ECE news story ]
[Dec 6, 2012] I have been selected as an IMPACT Faculty Fellow at Purdue for 2013-14. [ html ]
[July 15, 2013] My "Writings" page gets a facelift with tales of two recent travels. [ html ]
[June 2013] I am teaching a graduate level course (ECE 695/CS 590) titled "Fault-tolerant Computer System Design" in Fall 2013. Here is the flier for the course. [pdf] [ppt]
[August 2012] I am teaching a graduate level course titled "Fault-tolerant Computer System Design" in Fall 2012. Here is the flier for the course. [pdf] [html]
[June 2012] Our work on reliability with scientific applications from Lawrence Livermore National Lab get some press time. "Nuclear weapon simulations" is the headline grabbing moniker for the work, though we work with unclassified benchmark applications. [Purdue news story] [Campus newspaper news story]
[February 6, 2012] The non-linear version of my bio gets an update. [html]
[Mar 2012] Three papers of ours get into DSN this year.
[February 6, 2012] We are hiring another post-doc for the Missile Defense Agency project with immediate availability. The skills needed are computer and communications modeling and distributed algorithms (systems-focused, not theory-focused). Due to the restriction from the sponsor, the position is only open to US citizens or permanent residents. See the posting for the details. [pdf] [html]
[November 2, 2011] Our paper in Sensys wins the best paper award. The paper is: Aveksha: A Hardware-Software Approach for Non-intrusive Tracing and Profiling of Wireless Embedded Systems by Matthew Tancreti, Mohammad Sajjad Hossain, Saurabh Bagchi, and Vijay Raghunathan. Here is the final version of the paper. [pdf] And here is the final presentation. [pdf]
[September 2011] I am spending my sabbatical at IBM Research in Austin working in the Future Systems Department on an exciting new project on the intersection of mobile computing and IBM's cloud offerings. Time to make an honest living! [IBM Austin Research Lab]
[June 2011] My writings and picture album pages have gotten an update. [Writings] [Album]
[June 2011] I will be headed to DSN in Hong Kong June 26-30. There I am organizing a panel with the ambitious title of "10 grand challenges in dependability for the next decade." It will be on June 29 with an exciting set of 5 speakers, drawn from both industry and academia. See the links to the position statements in the DSN program. [DSN program]
[May 2011]I visited IBM Research in Austin and gave a presentation on our work on
debugging software bugs in large-scale systems. The presentation is available
from the presentations page of our research group. [html]
[April 2011] New post-doctoral position opening in DCSL for a DoD project. If you are a PhD graduate in Computer Science or Computer Engineering, have a strong research record in computer modeling and cyber security, are a US citizen or a permanent resident, take a look. [Announcement in pdf] [Announcement in html]
[November 2010] I have been appointed an Assistant Director of CERIAS, the university's security research and education center. I will be one of 4 Assistant Directors. You can find information about CERIAS at the following URL. [html]
[August 2010] We have been awarded a 3 year project by the Missile Defense Agency (MDA) of the Department of Defense titled "Agent-based Enhanced C2BMC Architecture." C2BMC stands for Command and Control, Battle Management, and Communications. The project is aimed at developing architectures for command and control of missile defense systems as part of the Enhanced C2BMC Program of MDA. It involves Dan DeLaurentis of Aeronautics and Astronautics Engineering at Purdue as the PI and me as the co-PI. Here is a news story that Purdue has just done on our grant. [Story from Purdue] [Story in Purdue Exponent, the campus newspaper]
6. [February 28, 2010] Our paper on automatic error detection in large-scale parallel programs, done with colleagues at Lawrence Livermore National Lab (LLNL) is accepted to appear at DSN (Dependable Systems and Networks), to be held June 28-July 1, 2010.
Purdue will be running the operations of NEES for 2009-2014. My role in this is the cybersecurity officer responsible for the security of NEES assets at NEEScomm (the headquarters, here at Purdue) as well as at the 14 sites through the US. You can find the press release upon the announcement of the NEES award and the announcement of the NEES team at the following URLs:
http://www.purdue.edu/UNS/x/2009b/090910RamirezNEES.html
"https://www.nees.org/about/neescomm/team/
8. [August 11, 2009] We are looking for two PhD students to join our lab as Research Assistants. [html]
[Oct 1, 09] These positions have been filled.
9.
[July
2, 2009] I have been selected to be the Program Committee Chair for DSN, our
premier conference, for its 2011 edition, which will be held in
. 10. [July 2009] Our papers have been accepted in Sensys, Supercomputing (nominated as a candidate for best student paper), Middleware, and MASS. Hey, this feels pretty good for all of us here.
11.
[May 19, 2009] I have been awarded the Teaching for
Tomorrow award by
12. [May 1, 2009] I have updated the picture album. [html]
13. [April 30, 2009] I have become a Senior Member of ACM and a Full Member of the Sigma Xi research society.
14. December 22, 2008: Two of our papers have been accepted for Infocom '09. The acceptance rate was 282/1435 = 19.7%.
15.
"Hermes: Fast and Energy Efficient Incremental Code
Updates for Wireless Sensor Networks," Rajesh Krishna Panta and Saurabh Bagchi. [pdf]
16. "Covert TCP/IP Timing Channels: Theory to Implementation," Sarah Sellke, Chih-Chun Wang, Saurabh Bagchi, and Ness Shroff. [pdf]
17. December 2008: I will be teaching a new graduate level course in Spring 09 - ECE 695B titled "Design of Fault Tolerant Computer Systems." This course updates a previous course ECE 572 that I last taught in Spring 07. ECE 695B meets Tue and Thu 1.30-2.45 in EE 115. You can find the syllabus at the course web page here [html].
18. November 26, 2008: I will be organizing a workshop on intrusion-tolerant systems called WRAITS, to be held with DSN 09 in Lisbon, Portugal on Jun 29-Jul 2, 2009. My co-organizers are Miguel Correia (U. of Lisbon) and Partha Pal (BBN Technologies). The workshop is called "Recent Advances on Intrusion-Tolerant Systems." Here is the web site of the previous conferences. [html]
19. November 11, 2008: Our patent filed with Avaya colleagues titled "Stateful and cross-protocol intrusion detection for voice over IP" has been approved. It was filed on September 30, 2004. Here is the patent on the USPTO site. [html]
20. November 9, 2008: Our long-delayed paper detailing in a comprehensive way our work on intrusion detection in Voice-over-IP environments has been accepted for publication in the Elsevier International Journal of Information Security.
21. "Intrusion Detection in Voice-over-IP Environments," Yu-Sung Wu, Vinita Apte, Saurabh Bagchi, Sachin Garg, and Navjot Singh. [pdf]
23. June, 2008: A slew of our papers are accepted at competitive conferences. Here is the lowdown on the latest contributions from our research group:
This paper tackles the problem of optimal responses to pick when an intrusion is detected in a distributed system. We show that optimality is NP-hard and present an approximate algorithm based on genetic algorithm to pick the best responses.
This paper presents the design of a communication layer for wireless sensor networks that can handle different priorities for different messages and still keep the energy expended low.
This paper presents a technique to determine the choice and placement of intrusion detectors among different services in a distributed system. It is not cost-effective to deploy them everywhere (maintenance, performance costs plus tedium of responding to alerts) and here we provide a Bayesian network-based that will (approximately) optimize the overall quality of detection in the system.
31. This paper presents a class of attacks called stealthy packet dropping in wireless multi-hop networks that no existing technique can detect. This class has the added property that local overhearing based techniques will cause a legitimate node to be accused. We show, how by maintaining a little additional information during route setup, this class of attacks can be detected through local overhearing.
32. April 14, 2008: My promotion to the position of an Associate Professor with tenure is approved by the highest powers (aka the Board of Trustees) and will take effect from Fall 08. The process has a few different rungs starting with the departmental meeting in early Fall (07), followed within a couple of weeks by the meeting at the College of Engineering level, and then at the University level in mid-Spring (08).
33. January 4, 2008: I have updated the page with ruminations on my current reads.
34. July 17, 2007: I have updated the pictures from the recent Scotland trip.
35. June 28, 2007: I am invited to give a talk at the summer meeting of the IFIP Working Group 10.4 on Dependable Computing and Fault Tolerance. It was held near Edinburgh, Scotland. I gave a talk on the security implications of covert timing channels in networked systems (slides).
36. June 25, 2007: I present our work on security in sleep-wake aware wireless networks at DSN (Dependable Systems and Networks) held in the Edinburgh International Conference Center (slides). I also gave a short talk on data modeling in sensor networks to suppress communication (slides).
37. June 11, 2007: The second Ph.D. student from DCSL, Gunjan Khanna, defended his thesis. His thesis is titled "Non Intrusive Detection and Diagnosis of Failures in High Throughput Distributed Systems". Here are the documents - Abstract, Thesis, and Presentation. Gunjan has gone to work for McKinsey in Pittsburgh.
38. Mar 15, 2007: Our papers are accepted for DSN and HPDC. The DSN paper is on providing security in multi-hop wireless networks that use sleep-wake scheduling and it was one of 24 papers accepted out of a total of 94 submitted to the PDS track. The HPDC paper is on failure-aware checkpointing in non-dedicated storage systems. The acceptance rate at HPDC was 20%. The conferences will be in June in Edinburgh and Monterey Bay, CA respectively.
39. Mar 10, 2007: We are starting work on a distributed intrusion detection system for Voice over IP applications under a new contract from Avaya Inc.
40. Mar 2, 2007: I gave a talk at UT Austin Computer Science on our work on reliability in grid systems. This is joint work with Joanne (Ren) and Prof. Rudi (Eigenmann).
41. Dec 14, 2006: The first PhD student from our research group, Issa Khalil graduated. His thesis topic was "Mitigation of Control and Data Traffic Attacks in Wireless Ad-Hoc and Sensor Networks." You can read his thesis here.
42. Nov 14, 2006: Our paper on sensor network reprogramming gets accepted into Infocom to be held in Anchorage, Alaska in May 2007. The authors are Rajesh Panta and Issa Khalil. 252 out of about 1400 papers were accepted giving an acceptance rate of about 18%. Another paper from our group on diagnosis in distributed systems was accepted as a short paper for Infocom.
43. Nov 3, 2006: An article on the kinds of forums (conferences and journals) where I publish my research and why I choose these forums.
