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Files from Matt Blaze

Email addressblaze at cis.upenn.edu
First Active2000-08-16
Last Active2013-01-31
Practicality Of Accelerometer Side Channels On Smartphones
Posted Jan 31, 2013
Authored by Matt Blaze, Adam J. Aviv, Benjamin Sapp, Jonathan M. Smith

Modern smartphones are equipped with a plethora of sensors that enable a wide range of interactions, but some of these sensors can be employed as a side channel to surreptitiously learn about user input. In this paper, the authors show that the accelerometer sensor can also be employed as a high-bandwidth side channel; particularly, we demonstrate how to use the accelerometer sensor to learn user tap and gesture-based input as required to unlock smartphones using a PIN/password or Android's graphical password pattern.

tags | paper
SHA-256 | b36715f052367ed9e7831c08a743263d5a554a959e5c0fc9a1237b419a10bb1a
wiretap.pdf
Posted Dec 10, 2005
Authored by Matt Blaze, Micah Sherr, Eric Cronin, Sandy Clark | Site crypto.com

Signaling Vulnerabilities In Wiretapping Systems. This white paper discusses vulnerabilities and countermeasures that exist within commonly used wiretapping systems by the government.

tags | paper, vulnerability
SHA-256 | a0e075d7c274ee78d33e9e39cf667bfd8939e7b1221cd444e636cc3c7d11b76c
mk.pdf
Posted Jan 24, 2003
Authored by Matt Blaze | Site crypto.com

Rights Amplification in Master-Keyed Mechanical Locks - This paper describes a relatively unknown procedure for obtaining a master key if given access to a tumbler based master keyed lock and any low level key in the system. No special skill or equipment beyond a small number of blank keys and a file is needed, and the attacker does not need to engage in any suspicious behavior at the locks location. Countermeasures are described with provide limited protection under certain circumstances.

tags | paper
SHA-256 | 562ab51f68cdb767a008ead12ba2e6dff9f5b95fde08373041067c0cc80dbfa9
cfs.1.4.0.beta2.tar.gz
Posted Aug 16, 2000
Authored by Matt Blaze

Cryptographic Filesystem (CFS) implements full filesystem encryption into the UNIX platform. This version supports BSD, Linux, and SunOS via local access to a NFS server.

tags | local, encryption
systems | linux, unix, solaris, bsd
SHA-256 | 3cbd19a28f3e5be3a9695bd55f23c99062ff51bd43f4cb2a76bb69d3f29411bf
cfs.1.4.0.beta1.tar.gz
Posted Aug 16, 2000
Authored by Matt Blaze

Cryptographic Filesystem (CFS) implements full filesystem encryption into the UNIX platform. This version supports BSD, Linux, and SunOS via local access to a NFS server.

tags | local, encryption
systems | linux, unix, solaris, bsd
SHA-256 | 6e8871f7d54cdbb49d5d8b7dcf0511561ba37f06ded39c1db36aa931c796f737
cfs-1.3.3.tar.gz
Posted Aug 16, 2000
Authored by Matt Blaze

Cryptographic Filesystem (CFS) implements full filesystem encryption into the UNIX platform. This version supports BSD, Linux, and SunOS via local access to a NFS server.

tags | local, encryption
systems | linux, unix, solaris, bsd
SHA-256 | f302fc8e2cded385639aea40edc56d54da51233abd35f728f0408fe77862d094
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