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:
May. 21, 2013
Filed:
Jul. 29, 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 lambda transitions for processing regular expressions in intrusion-prevention systems. In an embodiment, a state-transition table is provided, said table being representative of a predetermined data pattern, and including states having 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, a first state is transitioned into, the first state having an egress event defining a transition to a second state, a state count corresponding to a number of times the first state has been transitioned into, a state-count threshold, and a state-count condition. After transitioning into the first state, the state count is incremented. Responsive to determining that the state-count condition is satisfied by comparing the incremented state count with the state-count threshold, the transition to the second state is taken.