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NIPS
2008
15 years 9 months ago
Breaking Audio CAPTCHAs
CAPTCHAs are computer-generated tests that humans can pass but current computer systems cannot. CAPTCHAs provide a method for automatically distinguishing a human from a computer ...
Jennifer Tam, Jirí Simsa, Sean Hyde, Luis v...
CCS
2010
ACM
15 years 7 months ago
@spam: the underground on 140 characters or less
In this work we present a characterization of spam on Twitter. We find that 8% of 25 million URLs posted to the site point to phishing, malware, and scams listed on popular blackl...
Chris Grier, Kurt Thomas, Vern Paxson, Michael Zha...
ACSAC
2010
IEEE
15 years 5 months ago
Conficker and beyond: a large-scale empirical study
Conficker [26] is the most recent widespread, well-known worm/bot. According to several reports [16, 28], it has infected about 7 million to 15 million hosts and the victims are s...
Seungwon Shin, Guofei Gu
SBACPAD
2008
IEEE
127views Hardware» more  SBACPAD 2008»
16 years 2 months ago
Measuring Operating System Overhead on CMT Processors
Numerous studies have shown that Operating System (OS) noise is one of the reasons for significant performance degradation in clustered architectures. Although many studies exami...
Petar Radojkovic, Vladimir Cakarevic, Javier Verd&...
ICDCSW
2002
IEEE
16 years 17 days ago
Real-Time Processing of Media Streams: A Case for Event-Based Interaction
There are many challenges in devising solutions for online content processing of live networked multimedia sessions. These include the computational complexity of feature extracti...
Viktor S. Wold Eide, Frank Eliassen, Olav Lysne, O...