Light Weight Profiling Apparatus Distinguishes Layer 7 (HTTP) Distributed Denial of Service Attackers From Genuine Clients
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United States of America Patent
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Issued Date -
Sep 11, 2014
app pub date -
Jul 31, 2013
filing date -
Mar 8, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An apparatus discerns clients by the requests made to a web application server through a web application firewall, which injects client side code into the responses with a randomized challenge that needs a unique answer to be returned in the cookie. The client side code generates cookies, which identify a browser to the web application server, or the web application firewall in subsequent requests if made by a normally configured browser and a fail threshold is checked for subsequent requests originating from such a browser. Each browser is thus fingerprinted and if the expected answer failures exceed a threshold, the client is marked as suspicious and a subsequent Turing test is enforced to these suspicious clients, failing which, a subsequent defined action is taken.
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