Security Seminar

Applied Kleptography

Matthew Green

Assistant Professor
Johns Hopkins University
Tuesday, April 04, 2017
4:00pm - 5:30pm
3725 BBB

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About the Event

In 1996, Adam Young and Moti Yung coined the term "kleptography" to refer to the deliberate subversion of a cryptographic system by its designers. While kleptographic techniques were once a matter of theoretical interest, recent events have uncovered several real-world examples of possible kleptographic subversion in commercial cryptographic products. In this talk I will discuss these examples of sabotage. In particular, I will focus on the specific problem of subverting pseudorandom number generators (PRNGs), and show how induced vulnerabilities can lead to the total failure of cryptographic security protocols. Finally, I will discuss mitigations designed to detect and reduce the severity of these attacks.


Matthew Green is a cryptographer and professor at Johns Hopkins University. He has designed and analyzed cryptographic systems used in wireless networks, payment systems and digital content protection platforms. In his research he looks at the various ways cryptography can be used to promote user privacy.

Additional Information

Contact: Stephen Reger

Phone: 734-764-9401

Email: sereger@eecs.umich.edu

Sponsor(s): The Center for Computer Security & Society

Faculty Sponsor: Professor J. Alex Halderman

Open to: Public