1 files changed, 45 insertions, 0 deletions
diff --git a/columnar.py b/columnar.py
new file mode 100644
index 0000000..4b23255
--- /dev/null
+++ b/columnar.py
@@ -0,0 +1,45 @@
+import numpy as np
+message = input("Enter a message: ")
+key = input("Key: ")
+counter = 0
+length = len(message)//len(key)
+width = len(key)
+cipher = np.empty([length, width])
+
+for i in range(length):
+    for j in range(width):
+        cipher[i][j] = ord(message[counter])
+        counter+=1
+
+for i in range(length):
+    for j in range(width):
+        print(chr(round(cipher[i][j])), end="\t")
+    print()
+
+def column_order(key):
+    sorted_key = sorted(enumerate(key), key=lambda x: x[1])  # Sort by letter
+    order = {index: rank + 1 for rank, (index, _) in enumerate(sorted_key)}
+    return [order[i] for i in range(len(key))]
+
+position  = column_order(key)
+print(position)
+
+def minimum(arr):
+    min = arr[0]
+    for i in range(len(arr)):
+        if(arr[i]<min):
+            min=arr[i]
+    return min
+ciphertext = ""
+while position:
+    mini = minimum(position)
+    output = mini
+    for i in range(len(position)):
+        if position[i] == mini:
+            output=i
+            break
+    for i in range(length):
+        ciphertext += chr(round(cipher[i][output]))
+    position.pop(output)
+
+print(ciphertext)