Categories | Inventors
A Method for Protecting the Internet using TCP and IP Puzzles
OHSU # 0714
Technology Overview:
Technology
Overview
Denial-of-service
attacks are increasing being used by internet hackers trying to disrupt to
operations of a targeted company or to draw attention to themselves. One
technique for defending against these types of attacks is to use IP puzzles.
Previous puzzle mechanisms do not use control feedback in managing the
difficulty of the puzzles given to the client. By making puzzles static against
load, these mechanisms can either pass back puzzles that are too easy for
clients or puzzles that are too hard. In the former case, this renders puzzles
ineffective in controlling resource attacks. In the latter case, they force
clients to do an inordinate amount of extra, unnecessary work and lead to server
underutilization. We propose the use of adaptive puzzles that are controlled by
a variety of linear and non-linear control feedback algorithms.
Market
Summary
The Internet Security Software market grew 18% from 2000 to
2001 to reach USD 6 billion. The market is projected to experience an annual
growth rate of 16%, to increase the size of the global market to approximately
USD 11 billion by 2005. (source: IDC, March 4, 2002)
Inventors:
- Wu-chang Feng, CSE
Patents:
Issued | United States | 8,171,562 |
Categories:
For more information, contact:
Arvin Paranjpe
Technology Development Manager
503-494-3210