Explore a conference talk examining bandwidth denial-of-service (DoS) attacks against the Tor network. Investigate the feasibility and impact of three specific attacks: flooding default bridges, targeting the TorFlow measurement system, and using Tor to congest itself. Learn about the estimated costs and performance degradation associated with each attack, including reduced client throughput, increased download times, and higher maintenance costs. Compare these findings to the effects of Sybil DoS and deanonymization attacks. Gain insights into the vulnerabilities of Tor's infrastructure and the potential threats to its reliability as a tool for privacy-preserving online communication.