Invalidity dossier
US 7590728
System and method for detection of aberrant network behavior by clients of a network access gateway
Current assignee: OpenTV Inc
Added 9/23/2026, 11:17:30 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US7590728B2
Title: System and method for detection of aberrant network behavior by clients of a network access gateway
Assignee (current, as listed): OpenTV, Inc. (original assignee: Individual)
Key dates: Priority date 2004-03-10; filing date 2005-03-10; publication date (grant) 2009-09-15. Legal status listed as Active, with adjusted expiration 2026-08-17.
Inventor: Steven D. Tonnesen. Application number: US11/076,652.
Purpose: The patent addresses network security behind a network access gateway. Because the routing and NAT (IP masquerading) nature of gateways prevents an upstream ISP from correlating backhaul traffic to specific LAN clients, malware (worms, viruses, DoS/DDoS agents) or hostile users can congest the LAN and backhaul, burden other computers, and cost the ISP in remediation and support. Prior art methods—such as physically or logically disconnecting and reconnecting clients while monitoring gateway traffic—disrupt innocent clients, impose architectural requirements, and typically need human intervention.
Plain-language scope: One embodiment describes a system with a processor, first and second network interfaces, storage media, and computer instructions. The instructions observe network communications arriving at the first network interface from multiple clients and determine when a particular client's traffic indicates malware infection or other hostile activity. If communications are judged aberrant, the instructions can log the activity to storage, notify an administrative entity via either network interface, or apply access controls to that client's traffic.
Stated advantages over prior systems include: operating without human intervention; requiring less skill for manual traffic analysis; continuously monitoring all LAN traffic observationally; not requiring disconnection of LAN clients to identify the traffic source; and not requiring a usable network connection between the gateway and the point of administrative control.
Figures 1–4 depict an example network environment, a gateway detection method, an observation method, and a software module for accumulating information about suspected aberrant behavior.
Source: https://patents.google.com/patent/[US7590728](/patent/US7590728)/en
What the excerpt does not establish: It does not provide the full claims, complete specification, or prosecution history; and it does not establish litigation, ownership-transfer validity, patent validity, or the content of prior art beyond the background discussion quoted above.
Generated 10/1/2026, 9:32:47 PM
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Litigation summary
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Proceedings on file (0)
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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