The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 2012
Filed:
Apr. 19, 2007
Peter Rabinovitch, Kanata, CA;
Stanley Taihai Chow, Ottawa, CA;
Bassem Abdel-aziz, Kanata, CA;
Alcatel Lucent, Paris, FR;
Abstract
The invention detects stealth worm propagation by comparing the repeat elements in sets of destinations of a source in multiple time windows to a fitted distribution of same, stored as a benchmark plot. Measurements are performed over N time windows, wherein a representation of the set of destinations to which a respective source has sent packets is determined for each source, in each time window. The counting is performed using a hash table. Once N such sets of destinations have been obtained, the number Xof destinations that are common to N, N−1, N−2, . . . , 2, 1 windows is determined. Thus Xis the number of destinations that a particular source sent packets to in k time windows. Xis then compared to the corresponding value on the plot; anomalies indicate an attack from the respective source.