diff --git a/EnigmePython/codecesarencodage.py b/EnigmePython/codecesarencodage.py
index 1452080d..b59c09d6 100644
--- a/EnigmePython/codecesarencodage.py
+++ b/EnigmePython/codecesarencodage.py
@@ -37,6 +37,17 @@ def Decrypt(text, key):
             result += chr((ord(char) - key - 97) % 26 + 97)
     return result
 
+def DecryptVerif(text, key):
+    result = ""
+    for i in range(len(text)):
+        char = text[i]
+        if(char==" "):
+            result+=" "
+        elif (char.isupper()):
+            result += chr((ord(char) - key-65) % 26 + 65)
+        else:
+            result += chr((ord(char) - key - 97) % 26 + 97)
+    return result
     
 def testEncrypte(x):
     if(Encrypt("Hello world",2)!="Jgnnq yqtnf"):
@@ -52,4 +63,21 @@ def testEncrypte(x):
             return False
     return True
 
-print(testEncrypte(10))
\ No newline at end of file
+
+def testDecrypte(x):
+    if(Decrypt("Hello world",2)!="Jgnnq yqtnf"):
+        return False
+    if(Decrypt("Scripted",9)!="Blarycnm"):
+        return False
+    for i in range(x):
+        l=""
+        cle=r.randint(1,26)
+        for i in range(r.randint(1,10)):
+            l+=chr(r.randint(97,122))
+        if(Decrypt(l,cle)!=DecryptVerif(l,cle)):
+            return False
+    return True
+
+
+
+print(Decrypt("Scripted",4))Oynelpaz
\ No newline at end of file