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» Prototyping Networked Embedded Systems
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134
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CCS
2003
ACM
15 years 8 months ago
Using graphic turing tests to counter automated DDoS attacks against web servers
We present WebSOS, a novel overlay-based architecture that provides guaranteed access to a web server that is targeted by a denial of service (DoS) attack. Our approach exploits t...
William G. Morein, Angelos Stavrou, Debra L. Cook,...
MOBICOM
2010
ACM
15 years 3 months ago
Directional antenna diversity for mobile devices: characterizations and solutions
We report a first-of-its-kind realization of directional transmission for smartphone-like mobile devices using multiple passive directional antennas, supported by only one RF chai...
Ardalan Amiri Sani, Lin Zhong, Ashutosh Sabharwal
119
Voted
MOBICOM
2012
ACM
13 years 5 months ago
Argos: practical many-antenna base stations
Multi-user multiple-input multiple-output theory predicts manyfold capacity gains by leveraging many antennas on wireless base stations to serve multiple clients simultaneously th...
Clayton Shepard, Hang Yu, Narendra Anand, Erran Li...
CCS
2004
ACM
15 years 8 months ago
Attestation-based policy enforcement for remote access
Intranet access has become an essential function for corporate users. At the same time, corporation’s security administrators have little ability to control access to corporate ...
Reiner Sailer, Trent Jaeger, Xiaolan Zhang, Leende...
VLDB
2007
ACM
108views Database» more  VLDB 2007»
16 years 3 months ago
Update Exchange with Mappings and Provenance
We consider systems for data sharing among heterogeneous peers related by a network of schema mappings. Each peer has a locally controlled and edited database instance, but wants ...
Todd J. Green, Grigoris Karvounarakis, Zachary G. ...