http://qvt3o2ipzxx3gtoyafd3ptqwsxjs52enlwlxuryn2xjkm7hnp5icd6yd.onion/coyim/whats-new-v04/introduction/2022/02/13/whats-new-in-v04-improved-security.html
This means that you can
comfortable rely on the security of the encryption in CoyIM. On top of all these specific things, we have also resolved a large number of bugs in the program. In general, these did
not have any security impact, but it’s still nice to know that the quality of the code base has improved
significantly.