About me

I have graduated and joined Bell Labs, Alcatel-Lucent, as a researcher. You will be automatically redirected to my new website here in 5 seconds.

My PhD dissertation was titled "Towards Practical Privacy in Existing Distributed System" and is available here.

I'm a Ph. D. student at the Department of Computer Science, University of California Santa Barbara. Before coming here, I did my Bachelor of Engineering from the National Institute of Technology Karnataka, and worked for a while in the industry.

My research interests are in building large-scale networked systems. Specifically, my focus is on the security and privacy aspects of these systems. My recent focus has been on providing data confidentiality to users of third-party compute clouds, and preserving user location privacy in mobile location-based services. The goal here has been in developing techniques that are easy to incorporate into deployed applications, on today's existing cloud infrastructures, and yet provide strong privacy guarantees. My PhD thesis is about improving privacy in distributed systems, and this work on confidential cloud computing is an important part of it.

More details in my resume here.

Software and Datasets

Chimera: A Lightweight Structured Peer-to-Peer Overlay: Implemented in C, available for download, works on both Linux and WinXP.

Anonymized Facebook Crawl Dataset From Our EuroSys 2009 Paper: See the link for details on how to obtain the datasets.

Publications

Frugal Storage for Cloud File Systems
Krishna P. N. Puttaswamy, Thyaga Nandagopal, and Murali Kodialam
To Appear: Proceedings of ACM SIGOPS/EuroSys European Conference on Computer Systems (EuroSys 2012)
Bern, Switzerland, April 2012.

Beyond Social Graphs: User Interactions in Online Social Networks and their Implications
Christo Wilson, Alessandra Sala, Krishna P. N. Puttaswamy, and Ben Y. Zhao
To Appear: ACM Transactions on the Web 2012
Bern, Switzerland, April 2012.

Deja Vu: Fingerprinting Network Problems
Bhavish Aggarwal, Ranjita Bhagwan, Lorenzo De Carli, Venkat Padmanabhan, and Krishna P. N. Puttaswamy
The 7th International Conference on emerging Networking EXperiments and Technologies (CoNEXT) 2011
Tokyo, Japan, December 2011.

Silverline: Toward Data Confidentiality in Storage-Intensive Cloud Applications
Krishna P. N. Puttaswamy, Christopher Kruegel, and Ben Y. Zhao
The 2nd ACM Symposium on Cloud Computing (SoCC) 2011
Cascais, Portugal, October 2011.

Anonygator: Privacy and Integrity Preserving Data Aggregation
Krishna P. N. Puttaswamy, Ranjita Bhagwan, and Venkata N. Padmanabhan
ACM/IFIP/USENIX 11th International Middleware Conference (Middleware 2010)
Bangalore, India. November 2010

Docx2Go: Collaborative Editing of Fidelity Reduced Documents on Mobile Devices
Krishna P. N. Puttaswamy, Cathy Marshall, Venugopalan Ramasubramanian, Patrick Stuedi, Douglas B. Terry and Ted Wobber
8th Annual International Conference on Mobile Systems, Applications and Services (MobiSys 2010)
San Francisco, CA, USA. June 2010

Fidelity-Aware Replication for Mobile Devices
Venugopalan Ramasubramanian, Kaushik Veeraraghavan, Krishna P. N. Puttaswamy, Thomas L. Rodeheffer, Douglas B. Terry and Ted Wobber
IEEE Transactions on Mobile Computing (TMC), 2010

Preserving Privacy in Location-based Mobile Social Applications
Krishna P. N. Puttaswamy and Ben Y. Zhao
11th Workshop on Mobile Computing Systems and Applications (ACM HotMobile)
Annapolis, MD, February 2010.

StarClique: Guaranteeing User Privacy in Social Networks Against Intersection Attacks
Krishna P. N. Puttaswamy, Alessandra Sala, and Ben Y. Zhao
ACM Conference on emerging Networking EXperiments and Technologies (CoNEXT 2009)
Rome, Italy, December 2009.

User Interactions in Social Networks and their Implications
Christo Wilson, Bryce Boe, Alessandra Sala, Krishna P. N. Puttaswamy, and Ben Y. Zhao
Proceedings of ACM SIGOPS/EuroSys European Conference on Computer Systems (EuroSys 2009)
Nuremberg, Germany, April 2009.

Rome: Performance and Anonymity using Route Meshes
Krishna P. N. Puttaswamy, Alessandra Sala, Omer Egecioglu and Ben Y. Zhao
The 28th IEEE International Conference on Computer Communications (INFOCOM 2009) Miniconference
Rio De Janeiro, Brazil, April 2009.

Improving Anonymity using Social Links
Krishna P. N. Puttaswamy, Alessandra Sala, and Ben Y. Zhao
IEEE Workshop on Secure Network Protocols (NPSec 2008)
Orlando, FL, October 2008.

Defending Anonymity against Predecessor Attacks in Bluemoon
Krishna P. N. Puttaswamy, Alessandra Sala, Christo Wilson, and Ben Y. Zhao
IEEE International Conference on Network Protocols (ICNP 2008)
Orlando, FL, October 2008.

Securing Structured Overlays Against Identity Attacks
Krishna P. N. Puttaswamy, Ben Y. Zhao and Haitao Zheng
IEEE Transactions on Parallel and Distributed Systems (TPDS), 2008

Searching for Rare Objects using Index Replication
Krishna P. N. Puttaswamy, Alessandra Sala and Ben Y. Zhao
Proceedings of The 27th IEEE International Conference on Computer Communications (INFOCOM 2008)
Phoenix, AZ, April 2008.

A Case for Unstructured Distributed Hash Tables
Krishna P. N. Puttaswamy and Ben Y. Zhao
Proceedings of IEEE Global Internet Symposium (GI 2007)
Anchorage, AK, May 2007.

Posters

Silverline: Toward Data Confidentiality in Third-Party Clouds
Krishna P. N. Puttaswamy, Christopher Kruegel, and Ben Y. Zhao
Poster at the Proceedings of NSDI 2010.

Protecting Private Data in Third-Party Compute Clouds
Krishna P. N. Puttaswamy, Christopher Kruegel, and Ben Y. Zhao
Poster at the Proceedings of HotMobile 2010

Contact Info

Krishna Puttaswamy
PhD Candidate
Department of Computer Science
University of California
Santa Barbara, CA 93106-5110
Email: krishnap AT cs DOT ucsb DOT edu