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:
Sep. 20, 2011
Filed:
Jul. 30, 2008
Jason D. Preston, Austin, TX (US);
Jason D. Preston, Austin, TX (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Methods and systems are provided for using state ranges for processing regular expressions in intrusion-prevention systems. In an embodiment, in an intrusion-prevention system for examining network traffic and identifying therein the presence of signature data patterns, a state-transition table is provided. The state-transition table is representative of a predetermined data pattern, and includes states each having one or more egress events defining transitions to other states. A subject is received for evaluation for the presence of the predetermined data pattern. While using the state-transition table for said evaluation, the presence of a first egress event of a first state is detected in the subject, resulting in a transition from the first state to a second state. A second-state range in the subject is calculated, and the second-state range is searched for the presence of at least one of the second state's egress events.