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
Debra L. Cook
Angelos Stavrou
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?