I think that this probably needs a little text on collusion within a set of aggregators vs. within a set of coordinators vs. across both aggregators and coordinators. That is, we don't consider the role of a given helper party to affect this requirement, though some protocols could be more robust to compromise of a greater subset of the whole.
_Originally posted by @martinthomson in https://github.com/patcg/docs-and-reports/pull/14#discussion_r1001243056_