Using graphic turing tests to counter automated DDoS attacks against web servers
Proceedings of the 10th ACM conference on Computer and communication security - CCS ’03
Angelos Stavrou
William G. Morein
Dan Rubenstein
Vishal Misra
Angelos D. Keromytis
How Well Can Congestion Pricing Neutralize Denial of Service Attacks?
How well can congestion pricing neutralize denial of service attacks?