thinstuff

server/ideas.md

@@ -21,7 +21,7 @@ They never trigger quests or events where they go, but:
 - they can interact with adventurers (they are quite aggressive, and may attack unprovoked, maybe sneak past)
 - they can interact with each other, but mostly do so if there are PCs nearby.
 
-# Attrition
+# ATTRITION
 
 Even when a player is offline, their characters have to pay rent on their homes
 or room and board in an inn, or they can chance it in the wilderness.
@@ -30,3 +30,20 @@ If they run out of money or rations, there is a small chance each day that the
 characters will be garbage collected.
 
 The sum that needs paying while offline not very large though.
+
+# CHAT SPELL
+
+You can buy a spell that lets you initiate a secure and encrypted group chat
+with other players.
+
+The person who casts the spell generates a private key and sends the public key
+to the others in the chat. Each recipient then generates a one-time symmetric
+key and sends it securely (via the caster's public key) to the caster. The
+caster then generates a "group chat key" and sends it to each recipient via
+their one-time key.
+
+Any chats via the spell from then on is encrypted with the "group chat key".
+
+All parties throw away the group chat key when the spell ends.
+
+Each group chat has a name.