DocumentCode :
3807219
Title :
On the Race of Worms, Alerts, and Patches
Author :
Milan Vojnovic;Ayalvadi J. Ganesh
Author_Institution :
Microsoft Res. Ltd., Cambridge
Volume :
16
Issue :
5
fYear :
2008
Firstpage :
1066
Lastpage :
1079
Abstract :
We provide an analytical framework for evaluating the performance of automatic patching systems. We use it to quantify the speed of patch or alert dissemination required for worm containment. Motivated by scalability and trust issues, we consider a hierarchical system where network hosts are organized into subnets, each containing a patch server (termed superhost). Patches are disseminated to superhosts through an overlay connecting them and, after verification, to end hosts within subnets. The analytical framework accommodates a variety of overlays through the novel abstraction of a minimum broadcast curve. It also accommodates filtering of scans across subnets. The framework provides quantitative estimates that can guide system designers in dimensioning automatic patching systems. The results are obtained mathematically and verified by simulation.
Keywords :
"Broadcasting","Internet","Performance analysis","Scalability","Hierarchical systems","Network servers","Joining processes","Information filtering","Information filters","Humans"
Journal_Title :
IEEE/ACM Transactions on Networking
Publisher :
ieee
ISSN :
1063-6692
Type :
jour
DOI :
10.1109/TNET.2007.909678
Filename :
4455449
Link To Document :
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