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Matthew D. Green
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I am an Assistant Research Professor at the Johns Hopkins Information Security Institute. I completed my PhD in 2008 with advisors Susan Hohenberger and Avi Rubin.
My research includes techniques for privacy-enhanced information
storage, radio-frequency identification (RFID), and elliptic curve
cryptography. I am also a co-founder of Independent Security Evaluators, a custom security evaluation and design consultancy. From
1999-2003, I served as a senior technical staff member at AT&T
Laboratories/Research in Florham Park, NJ.
Research Interests
My research focus is in the area of applied cryptography, specifically: developing privacy-preserving cryptographic protocols that allow users to access databases without revealing which data they're accessing. Additionally, I have been working on new signature techniques to support authentication in sensor networks.
I also work in the area of cryptographic engineering. This work involves understanding the practical aspects of cryptographic systems, implementing cryptographic protocols, and in some cases reverse-engineering deployed systems. I teach an introductory course on this subject. Additionally, I've designed several cryptographic tools, including Charm, a framework for rapidly prototyping cryptosystems, and a Functional Encryption library that implements several new Attribute Based Encryption schemes.
Download my Cirriculum Vitae.
Teaching
600.642: Advanced Topics in Cryptography. Fall 2011.
650.445: Practical Cryptographic Systems. Spring 2011, 2010, 2009. (I'm gradually writing this course up in the form of a blog).
My Blog
A Few Thoughts on Cryptographic Engineering. Started as a lazy man's attempt to write a book on practical crypto topics, this has gradually taken on a life of its own.
Conference Papers
"New Definitions and Separations for Circular Security". D. Cash, M. Green, S. Hohenberger. To appear in PKC 2012.
"Self-Protecting Electronic Medical Records Using Attribute-Based Encryption". J. A. Akinyele, C. Lehmann, M. Green, M. Pagano, Z. Peterson, A. Rubin. In ACM CCS SPSM 2011 (ePrint PDF)
"Outsourcing the Decryption of ABE Ciphertexts". M. Green, S. Hohenberger, B. Waters. In Usenix Security 2011.
"A Research Roadmap for Healthcare IT Security Inspired by the PCAST Health Information Technology Report". M. Green, A. Rubin. In HealthSec 2011. (PDF)
"Practical Oblivious Transfer from Simple Assumptions". M. Green, S. Hohenberger. In TCC 2011. (ePrint draft, PDF)
"Secure Blind Decryption". M. Green. In PKC 2011. (ePrint PDF).
"Synchronized Aggregate Signatures". J. H. Ahn, M. Green,
S. Hohenberger. In ACM CCS 2010. (eprint PDF)
"On the Practicality of Short Signature Batch Verification". A. L. Ferrara, M. Green,
S. Hohenberger, M. O. Pedersen. In CT-RSA 2009. (ePrint PDF)
"Securing Medical Records on Smart Phones". R. W. Gardner, S. Garera, M. W. Pagano, M. Green and A. Rubin. In SPIMACS 2009.
"Controlling Access to an Oblivious Database using Stateful Anonymous Credentials". S. Coull, M. Green,
S. Hohenberger. In PKC 2009. (ePrint PDF)
"Universally Composable Adaptive Oblivious Transfer". M. Green,
S. Hohenberger. In ASIACRYPT 2008. (ePrint PDF)
"Blind Identity-Based Encryption and Simulatable Oblivious Transfer". M. Green,
S. Hohenberger. ASIACRYPT 2007. (ePrint PDF) (conference PDF)
"Identity-Based Proxy Re-encryption". M. Green,
G. Ateniese. In ACNS 2007. (ePrint PDF)
"Security Analysis of a Cryptographically-Enabled
RFID Device". S. Bono, M. Green, A. Stubblefield, A. Juels,
A. Rubin, M. Szydlo. 14th USENIX Security Symposium, August 2005. (PDF). "Best Student Paper", Usenix Security 2005.
"Improved Proxy Re-encryption Schemes with
Applications to Secure Distributed Storage" (Conference version).
G. Ateniese, K. Fu, M. Green, S. Hohenberger. Proceedings of the 12th Annual Network and
Distributed Systems Security Symposium (NDSS
2005), San Diego, California, 2005. (Full Version PDF)
"PRISM, an IP-Based Architecture for Broadband Access to TV and Other Streaming Media" A. Basso, C. Cranor, R. Gopalakrishnan, M. Green, C.R. Kalmanek, D. Shur, S. Sibal, C.J. Sreenan, J.E. van der Merwe. Proceedings of IEEE International Workshop of Network and Operating System Support for Digital Audio and Video (NOSSDAV), June 2000. (PDF)
Journal Publications
"Access Controls for Oblivious and Anonymous Systems". G. S. Coull, M. Green, S. Hohenberger. To appear in ACM Transactions on Information and System Security (TISSEC).
"Improved Proxy Re-encryption Schemes with Applications to Secure Distributed Storage". G. Ateniese, K. Fu, M. Green, S. Hohenberger. ACM Transactions on Information and System Security (TISSEC), Volume 9, Issue 1, 2006. (ACM Portal)
"Security Through Legality".
S. Bono, A. Rubin, A. Stubblefield, M. Green. Communications of the ACM (CACM), June 2006.
"Prism Architecture: Supporting Enhanced Streaming Services in a Content Distribution Network". C. Cranor, M. Green,C.Kalmanek, D. Shur, S. Sibal, K. van der Merwe. IEEE Internet Computing,pp. 66-75, July/August 2001 (PDF)
Technical Reports and Submissions
"CPA and CCA-Secure Encryption Systems that are not 2-Circular Secure". M. Green, S. Hohenberger. (ePrint PDF)
"Correlation-Resistant Storage via Keyword-Searchable Encryption". L. Ballard,
M. Green, B. de Medeiros, F. Monrose. Technical Report. (PDF)
"Content Protection for Optical Media". M. Green. 2005. (PDF)
Thesis
"Cryptography for Secure and Private Databases: Enabling Practical Database Access without Compromising Privacy". M. Green; Ph. D. Thesis (PDF)
Software Projects / Misc.
Charm: A framework for rapidly prototyping cryptosystems. A Python-based prototyping framework to assist cryptographers and researchers in the development of new cryptographic schemes and protocols.
The Functional Encryption Library. An implementation of several modern key-policy and ciphertext-policy Attribute-Based Encryption schemes, part of the FEATURES project.
"The JHU-MIT Proxy Re-cryptography Library". A C++ implementation of two proxy re-encryption schemes.
"Art for Cryptographers". Not a software project at all -- a bit of wonderful graphic art for use in security presentations. Usenix Security 2012. Website and CFP.Program Committees
PKC 2012. Website and CFP.
Usenix Security 2011. Website and CFP.
CANS 2010. Website and CFP.
EC-Web 2010. Website and CFP.
ProvSec 2010. Website and CFP.
ICISC 2009. Website and CFP.
Pairing 2009. Website and CFP.
EC-Web 2009. Website and CFP.
Invited Talks and Awards
7.19.2011 Microsoft Research. "Charm: A framework for rapidly prototyping cryptosystems". (Video)
9.15.2005 National Science Foundation. "Attacking and Defending RFID Security Systems".
"Award for Outstanding Research in Privacy Enhancing Technologies (PET award)", 2007. (press release).
Industry Experience
Co-founder, Independent Security Evaluators (ISE). Custom evaluation and design of security systems.
Senior Technical Staff Member, AT&T
Laboratories/Research, Florham Park, NJ. 1999-2003. Conducted research and oversaw technology
transfer for audio coding, secure content delivery and content
distribution network projects.
Contact Information
Postal Mail: Matthew Green, JHU Information Security Institute, 3400
North Charles Street, 208 Maryland Hall, Baltimore, MD 21218
Phone: (410) 861-0344
Fax: (410) 516-8457
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