diff --git a/overlay/opt/emcomm-tools/bin/et-auth-table.sh b/overlay/opt/emcomm-tools/bin/et-auth-table.sh
new file mode 100755
index 0000000..5a0b94e
--- /dev/null
+++ b/overlay/opt/emcomm-tools/bin/et-auth-table.sh
@@ -0,0 +1,23 @@
+#/bin/bash
+# Author  : Gaston Gonzalez
+# Date    : 7 January 2025
+# Purpose : Generates an authentication table
+
+top=( {A..M} )
+side=( {N..Z} )
+chars=( {A..Z} {0..9} )
+
+printf "%2s " ""
+for col in "${top[@]}"; do
+  printf "%2s " "$col"
+done
+printf "\n"
+
+for row in "${side[@]}"; do
+  printf "%2s " "$row"
+  for col in "${top[@]}"; do
+    rand_index=$(( RANDOM % ${#chars[@]} ))
+    printf "%2s " "${chars[$rand_index]}"
+  done
+  printf "\n"
+done