Update and rename Python/3.6.3/decrypt.py to Python3/decrypt.py

CrypTools · Dec 19, 2017 · 5eac652 · 5eac652
1 parent d6f6c24
commit 5eac652
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Showing 2 changed files with 13 additions and 11 deletions.
diff --git a/Python/3.6.3/decrypt.py b/Python/3.6.3/decrypt.py
diff --git a/Python3/decrypt.py b/Python3/decrypt.py
@@ -0,0 +1,13 @@
+def decrypt(initial, key):
+  """ Use : decrypt("COWUUDNYXGCJFCQVW", "keyword")
+  => 'MESSAGEINCAPITALS'
+  """
+  lkey = len(key)
+  list1 = [ord(i) for i in key]
+  list2 = [ord(i) for i in initial]
+  output = ''
+  for i in range(len(list2)):
+    value = (list2[i] - list1[i % lkey]) % 26
+    output += chr(value + 65)
+
+  return output