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CCS
2003
ACM
13 years 10 months ago
Using graphic turing tests to counter automated DDoS attacks against web servers
We present WebSOS, a novel overlay-based architecture that provides guaranteed access to a web server that is targeted by a denial of service (DoS) attack. Our approach exploits t...
William G. Morein, Angelos Stavrou, Debra L. Cook,...
ACNS
2004
Springer
77views Cryptology» more  ACNS 2004»
13 years 10 months ago
A Pay-per-Use DoS Protection Mechanism for the Web
Internet service providers have resisted deploying Denial-of-Service (DoS) protection mechanisms despite numerous research results in the area. This is so primarily because ISPs ca...
Angelos Stavrou, John Ioannidis, Angelos D. Keromy...