Ariel J. Feldman
Princeton University
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Featured researches published by Ariel J. Feldman.
Communications of The ACM | 2009
J. Alex Halderman; Seth D. Schoen; Nadia Heninger; William Clarkson; William Paul; Joseph A. Calandrino; Ariel J. Feldman; Jacob Appelbaum; Edward W. Felten
Contrary to widespread assumption, dynamic RAM (DRAM), the main memory in most modern computers, retains its contents for several seconds after power is lost, even at room temperature and even if removed from a motherboard. Although DRAM becomes less reliable when it is not refreshed, it is not immediately erased, and its contents persist sufficiently for malicious (or forensic) acquisition of usable full-system memory images. We show that this phenomenon limits the ability of an operating system to protect cryptographic key material from an attacker with physical access to a machine. It poses a particular threat to laptop users who rely on disk encryption: we demonstrate that it could be used to compromise several popular disk encryption products without the need for any special devices or materials. We experimentally characterize the extent and predictability of memory retention and report that remanence times can be increased dramatically with simple cooling techniques. We offer new algorithms for finding cryptographic keys in memory images and for correcting errors caused by bit decay. Though we discuss several strategies for mitigating these risks, we know of no simple remedy that would eliminate them.
usenix security symposium | 2008
J. Alex Halderman; Seth D. Schoen; Nadia Heninger; William Clarkson; William Paul; Joseph A. Calandrino; Ariel J. Feldman; Jacob Appelbaum; Edward W. Felten
operating systems design and implementation | 2010
Ariel J. Feldman; William P. Zeller; Michael J. Freedman; Edward W. Felten
usenix workshop on accurate electronic voting technology | 2007
Ariel J. Feldman; J. Alex Halderman; Edward W. Felten
conference on electronic voting technology workshop on trustworthy elections | 2009
Stephen Checkoway; Ariel J. Feldman; Brian Kantor; J. Alex Halderman; Edward W. Felten; Hovav Shacham
usenix security symposium | 2012
Ariel J. Feldman; Aaron Blankstein; Michael J. Freedman; Edward W. Felten
conference on electronic voting technology workshop on trustworthy elections | 2009
Ariel J. Feldman; Josh Benaloh
Archive | 2012
Edward W. Felten; Ariel J. Feldman
IEEE Data(base) Engineering Bulletin | 2012
Ariel J. Feldman; Aaron Blankstein; Michael J. Freedman; Edward W. Felten
Archive | 2012
Ariel J. Feldman; Aaron Blankstein; Michael J. Freedman; Edward W. Felten