diff --git a/src/mimick_csharp_test.py b/src/mimick_csharp_test.py
index e129524..62cdc2c 100644
--- a/src/mimick_csharp_test.py
+++ b/src/mimick_csharp_test.py
@@ -198,8 +198,6 @@ def transceive_medium(medium_phase1: DarcKey, client_persistent_keys: ClientPers
     mo1 = mutual_persistent_keys.outer_key_1 << mutual_ephemeral_keys.outer_key_1
     mo2 = mutual_persistent_keys.outer_key_2 << mutual_ephemeral_keys.outer_key_2
     mo3 = mutual_persistent_keys.outer_key_3 << mutual_ephemeral_keys.outer_key_3
-    co1 = client_persistent_keys.outer_key_1 << client_ephemeral_keys.outer_key_1
-    co2 = client_persistent_keys.outer_key_2 << client_ephemeral_keys.outer_key_2
 
     mi1_mo2 = mi1 < mo2
 
@@ -210,7 +208,7 @@ def transceive_medium(medium_phase1: DarcKey, client_persistent_keys: ClientPers
 
     mpi1_mo3 = mutual_persistent_keys.inner_key_2 < mo3
 
-    medium_phase3 = (result << mpi1_mo3) < (co1 << co2)
+    medium_phase3 = (result << mpi1_mo3)
     return medium_phase3
 
 
@@ -226,15 +224,9 @@ def merge_message(alphabet: DarcKey, medium: DarcKey, client_keys: ClientKeys, m
 
     input_seq = padded_input_sequence
 
-    cmo1 = client_keys.persistent.medium.outer_key_1 << client_keys.ephemeral.medium.outer_key_1
-    cmo2 = client_keys.persistent.medium.outer_key_2 << client_keys.ephemeral.medium.outer_key_2
-
-    cmo1_cmo2 = cmo1 << cmo2
 
     a_i = alphabet < input_seq
 
-    ncmo2_ncmo1 = ~cmo1_cmo2
-
     if msg_len < height:
         a_i.matrix[msg_len] = eof_arr
 
@@ -248,16 +240,15 @@ def merge_message(alphabet: DarcKey, medium: DarcKey, client_keys: ClientKeys, m
 
     mmi3_nmmo6_nmmo4_co1_co2 = (mmi3 < nmmo6_nmmo4_co1_co2)
 
-    message = medium ^ ((a_i << mmi3_nmmo6_nmmo4_co1_co2) < cmo1_cmo2 )
+    message = (medium ) ^ ((a_i << mmi3_nmmo6_nmmo4_co1_co2))
 
     mmo5 = mutual_keys.persistent.medium.outer_key_5 << mutual_keys.ephemeral.medium.outer_key_5
     mpmi4_memi2 = mutual_keys.persistent.medium.inner_key_4 << mutual_keys.ephemeral.medium.inner_key_2
 
-    mutual_outer_key_4 = ncmo2_ncmo1 << mmo4
-    outer_key_2 = mmo5 << nmmo6_nmmo4 << cmo1_cmo2
+    mmo5_nmmo6_nmmo4 = mmo5 << nmmo6_nmmo4
 
-    message = message << (mpmi4_memi2 < outer_key_2)
-    message = message < mutual_outer_key_4
+    message = message << ((mpmi4_memi2 < mmo5_nmmo6_nmmo4))
+    message = (message ) < mmo4
     return message