Semi-active probing framework to gather threat intelligence for encrypted traffic and learn about devices

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United States of America Patent

PATENT NO 11570166
APP PUB NO 20200244648A1
SERIAL NO

16851674

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Abstract

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In one embodiment, a device in a network observes traffic between a client and a server for an encrypted session. The device makes a determination that a server certificate should be obtained from the server. The device, based on the determination, sends a handshake probe to the server. The device extracts server certificate information from a handshake response from the server that the server sent in response to the handshake probe. The device uses the extracted server certificate information to analyze the traffic between the client and the server.

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Patent Owner(s)

  • CISCO TECHNOLOGY INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Anderson, Blake Harrell Chapel Hill, US 83 635
Hudson,, Jr William Michael Cary, US 4 12
McGrew, David Poolesville, US 114 1395
Paul, Subharthi San Jose, US 14 75
Perricone, Philip Ryan Raleigh, US 2 9

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