This is an attempt to explain the details of the trusted ceremony, why it was needed, and what is being trusted. I like that it describes two different levels

This is an attempt to explain the details of the trusted ceremony, why it was needed, and what is being trusted. I like that it describes two different levels of trust required — trust in both the destruction of the initial secrets and in the original formulation of the problem. Were both levels of trust established, in the case of ZCash?