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:
Jul. 28, 2009
Filed:
Sep. 25, 2001
Michael P. Lyle, San Jose, CA (US);
Dan Vekhter, San Carlos, CA (US);
Brandon Suzuki, Sunnyvale, CA (US);
Michael P. Lyle, San Jose, CA (US);
Dan Vekhter, San Carlos, CA (US);
Brandon Suzuki, Sunnyvale, CA (US);
Symantec Corporation, Cupertino, CA (US);
Abstract
A system and method are disclosed for analyzing a network protocol stream for a security-related event. At least two states associated with the network protocol in which a first host system communicating with a second host system using the network protocol may be placed are identified. At least one valid transition between a first state of the at least two states and a second state of the at least two states is defined. The at least one valid transition is expressed in the form of a regular expression. The regular expression is used to analyze the network protocol stream.