So I watched his talk and I&#x27;m pretty confused -- it felt like a rehash of a lot of well-understood stuff (mix nets, which IMO are awesome and underutilized, MPC, etc.), but it was an odd mix of very high level and very low level details.  I haven&#x27;t read either the cMix or PrivaTegrity papers yet.<p>However, even if this is a fatally flawed system as a whole, it&#x27;s entirely possible there is some interesting research, maybe even useful tools here.<p>It is an interesting idea, being able to protocol-level enforcement of various types of surveillance.  Of course, if the level you choose is &quot;none&quot;, then you don&#x27;t need the complexity of the enforcement mechanism.