http://qvt3o2ipzxx3gtoyafd3ptqwsxjs52enlwlxuryn2xjkm7hnp5icd6yd.onion/coyim/whats-new-v04/introduction/2022/02/13/whats-new-in-v04-improved-security.html
Some are simply related to how we implement things, while others are
direct security features. One thing to keep in mind with CoyIM is that we always have to balance different types of
features based on their complexity, the risk that they could be exploited in some way, and whether they might have an
impact on any of the security properties of CoyIM.