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-# Attacks On Cwtch
-
-
-## Server Censorship
-
-Servers must keep things for as long as possible. This messes with bandwidth requirements, means syncing takes really long.
-
-We could improve fetch to say something like...fetch messages sent within the last day to improve that.
-
-We should already restrict length to 1kb.
-
-Force servers to keep things forever? Have clients do checks? Is this potentially creating a bigger issue down the line?
-
-This means that secure key rotation is essential! We can't just rely on kdf because the rotation rate is known. Send secret
-salt on invite!
-
-## Subgroup Attack
-
-* Alice invites Bob and Carol to her Group
-* Carol invites Eve to the group, pretending that she is the Owner.
-* After some time passes Carol send Eve a group key update
-* Carol can now selectively reencrypt messages from Alice and Bob to Carol under the new group key.
-
-Defenses
---------
-
-Eve rejects the initial group invitation because the signed group id doesn't match Carol
-Carol can create a new group with all the sam parameters and sign it herself though.
-However Carol will notice messages she can decrypt but are intended for another group, and if she tries to send
-a message to the group, Alice and Bob will discover their group has been compromised.
-
-## Key Rotation Attacks
-
-* Alice invites Bob and Carol to a new Group
-* Alice invites Eve
-    * Alice rotates the key (using a kdf), sends the new key to the Group
-    * Alice sends invite to Eve with new Key
-
-Now there is a window where Bob and Carol send messages without receiving the new Key. There is also a possibility that
-Bob or Carol miss the Key rotation message by being offline during the entire Server buffer period.
-
-Alice should then technically rebroadcast the key rotation message, along with the iteration, until she received confirmation from Bob and Carol?
-
-RotateKey, 1
-AckRotateKey
-
-Invite
- mAckInvite
-