MarkEncryption

Recommend for anarchy servers.

MarkEncryption is a client-only Fabric mod that encodes chat messages starting with a configurable prefix and sends them as dec <base62> strings. Other clients using the same prefix and key can decode and read them.

Press K to open the settings menu (the keybind can be changed).

The first field is for setting the key.

The second field is for setting the prefix.

Donation information can be found on the project's GitHub page.