Degrading Tor network performance only costs a few thousand dollars per month Attackers can flood Tor's bridges with just $17k/month, Tor's load balancers for only $2.8k/month, academics say August 18, 2019 https://www.zdnet.com/article/degra...-only-costs-a-few-thousand-dollars-per-month/ White paper: "Point Break: A Study of Bandwidth Denial-of-Service Attacks against Tor" (PDF - 833 KB): https://www.usenix.org/system/files/sec19-jansen.pdf