Explore a conference talk from BSides Budapest IT Security Conference that delves into the impact of cryptographic libraries on DoS attacks, specifically examining the D(HE)at vulnerability (CVE-2002-20001) affecting Diffie-Hellman key exchange. Learn how attackers can exploit CPU-intensive computations to overload servers, with detailed analysis of how different factors like key sizes, cryptographic protocols, and server applications influence attack effectiveness. Watch practical demonstrations of server overloading in TLS, SSH, and IPsec protocols, while understanding how various crypto library implementations can significantly affect vulnerability levels and the bandwidth required to consume server CPU resources.