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:
Oct. 15, 2019
Filed:
May. 25, 2017
F-secure Corporation, Helsinki, FI;
Daavid Hentunen, Helsinki, FI;
F-Secure Corporation, Helsinki, FI;
Abstract
Aspects of the invention relate to a method for preventing communication through covert channels in a Local Area Network (LAN). The method includes suspending an inbound or an outbound network connection related to a network element for a predetermined period of time, determining if any respective outbound or inbound network connection related to the same or any other network element ceases to transmit for the duration of the time period predetermined, if an outbound or inbound network connection is detected to cease transmission, concluding that the inbound or outbound network connection suspended and the respective outbound or inbound network connections are connected, determining whether the connected network connections use different transmission protocols and if the connected network connections are detected to use different transmission protocols, determining that the connected network connections are related to a malicious covert channel and taking action to prevent the malicious covert channel from working.