Mechanistically Modeling of Hydraulic Fracture Propagation ...
Virus Propagation Modeling
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Transcript of Virus Propagation Modeling
Virus Propagation Modeling
Chenxi Wang, Christos Faloutsos
Yang Wang, Deepayan Chakrabarti
Carnegie Mellon University
Center for Computer and Communications Security
Internet Viruses and Worms
• Computer viruses/worms are a prevalent threat – SQL Slammer worm infected 90%+ of the vulnerable
hosts within the first 10 minutes
• Existing defenses are not adequate– Largely ad hoc– Require human intervention
• Analytic models can help
Epidemiological Modeling
• Previous models – Homogeneous
– BA Power-law graphs
• Epidemic threshold
out diesinfection . . . . . . if
endemic . . . . . . ratedeath
ratebirth if
Epidemiological Modeling
• Previous predictions are not general
• Homogeneous
1
2k
k
• Power law graphs
Epidemiological Modeling Our threshold prediction
1
1
1, largest eigenvalue
Captured in one
parameter Works for arbitrary graphs! [WCWF03]