As you might have heard, some onion services have been experiencing issues with denial-of-service (DoS) attacks over the past few years. In this post, we would like to present you with two options that we believe can provide a long-term defense to the problem while maintaining the usability and security of onion services.

The Tor Project has learned that there may be an attempt to incapacitate our network in the next few days through the seizure of specialized servers in the network called directory authorities.

New work on denial of service in Tor will be presented at NDSS '14 on Tuesday, February 25th, 2014: