The full text of this article
Optimal worm-scanning method using vulnerable-host distributions
by Zesheng Chen, Chuanyi Ji
International Journal of Security and Networks (IJSN), Vol. 2, No. 1/2, 2007
Abstract: Most internet worms use random scanning. The distribution of vulnerable hosts on the internet, however, is highly non-uniform over the IP-address space. This implies that random scanning wastes many scans on invulnerable addresses and more virulent scanning schemes may take advantage of the non-uniformity of a vulnerable-host distribution. Questions then arise as to how attackers may exploit such information and how virulent the resulting worm may be. These issues provide 'worst-case scenarios'for defenders and 'best-case scenarios'for attackers when the vulnerable-host distribution is available. This work develops such a scenario, called importance scanning, which results from importance sampling in statistics. Importance scanning scans the IP-address space according to an empirical distribution of vulnerable hosts. An analytical model is developed to relate the infection rate of worms with the Importance-Scanning (IS) strategies. Based on parameters chosen from Witty and Code Red worms, the experimental results show that an IS worm can spread much faster than either a random-scanning worm or a routing worm. In addition, a game-theoretical approach suggests that the best strategy for defenders is to scatter applications uniformly in the entire IP-address space.
Online publication date: Fri, 16-Mar-2007
is only available to individual subscribers or to users at subscribing institutions.
Go to Inderscience Online Journals to access the Full Text of this article.
Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.
Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Security and Networks (IJSN):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable).
See our Orders page to subscribe.
If you still need assistance, please email email@example.com