From d22ec80ee7fd3ddd302568a5a5e240578f51bf9b Mon Sep 17 00:00:00 2001
From: Donovan <donovan.a.kelly@pm.me>
Date: Thu, 26 Jun 2025 13:37:50 -0500
Subject: [PATCH] remove chacha from enrollment

---
 docs/nkode_over_unencrypted_channel.md | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/docs/nkode_over_unencrypted_channel.md b/docs/nkode_over_unencrypted_channel.md
index 26f1875..136dc3b 100644
--- a/docs/nkode_over_unencrypted_channel.md
+++ b/docs/nkode_over_unencrypted_channel.md
@@ -52,29 +52,18 @@ sequenceDiagram
     rect rgb(191, 223, 255)
     Server -->> Mobile Client: Store ChaCha20 256-bit key
     end
-    rect rgb(191, 223, 255)
-    Server ->> Server: Shuffled Keypad Index Array =<br/>ChaCha20FisherYates(Keypad Index Array, SharedKey, Nonce)
-    Server ->> Mobile Client: Shuffled Keypad Index Array + Nonce
-    end
-    Note right of Server: Server also sends the 96-bit nonce in plain-text.<br/>The Server must never use the same nonce twice.<br/>It must be randonly generated for every authentication.<br/>The only additional overhead is the 96-bit nonce.
-    rect rgb(191, 223, 255)
-    Mobile Client ->> Mobile Client: Keypad Index Array =<br/>Unshuffle(Shuffled Keypad Index Array, SharedKey, Nonce)
+    Server ->> Mobile Client: Keypad Index Array
     end
     Mobile Client ->> User: Render Keypad
     User ->> Server: Set nKode
     Server ->> Server: Disperse Keypad
-    rect rgb(191, 223, 255)
-    Server ->> Server: Shuffled Keypad Index Array =<br/>ChaCha20FisherYates(Keypad Index Array, SharedKey, Nonce)
-    Server ->> Mobile Client: Shuffled Keypad Index Array + Nonce
-    end
-    rect rgb(191, 223, 255)
-    Mobile Client ->> Mobile Client: Keypad Index Array =<br/>Unshuffle(Shuffled Keypad Index Array, SharedKey, Nonce)
-    end
+    Server ->> Mobile Client: Keypad Index Array
     Mobile Client ->> User: Render Keypad
     User ->> Server: Confirm nKode
     Note over User,Server: Login
     rect rgb(191, 223, 255)
     Server ->> Server: Shuffled Keypad Index Array =<br/>ChaCha20FisherYates(Keypad Index Array, SharedKey, Nonce)
+    Note right of Server: Server also sends the 96-bit nonce in plain-text.<br/>The Server must never use the same nonce twice.<br/>It must be randonly generated for every authentication.<br/>The only additional overhead is the 96-bit nonce.
     Server ->> Mobile Client: Shuffled Keypad Index Array + Nonce
     end
     rect rgb(191, 223, 255)