diff --git a/Caesar-Cipher-Decoder/README.md b/Caesar-Cipher-Decoder/README.md
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+# Caesar Cipher Decoder
+Caesar cipher decryption program in python.
+
+
+# Installation
+
+<pre>git clone https://github.com/vijaysahuofficial/Caesar-Cipher-Decoder.git</pre>
+
+<pre>cd Caesar-Cipher-Decoder</pre>
+
+<pre>sudo chmod +x ccdecoder.py</pre>
+
+<pre>./ccdecoder.py</pre>
+
+<h2>Windows</h2>
+<pre>python3 ccdecoder.py</pre>
+
+<h2>Termux</h2>
+<pre>pkg install python -y</pre>
+<pre>pkg install git -y</pre>
+<pre>git clone https://github.com/vijaysahuofficial/Caesar-Cipher-Decoder.git</pre>
+<pre>cd Caesar-Cipher-Decoder</pre>
+<pre>chmod +x ccdecoder.py</pre>
+<pre>./ccdecoder.py</pre>
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diff --git a/Caesar-Cipher-Decoder/ccdecoder.py b/Caesar-Cipher-Decoder/ccdecoder.py
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+#! /usr/bin/python3
+
+import string
+alpha = string.ascii_lowercase 
+
+def decrypt(x,y): 
+    decrypted = ""
+    for i in x:
+        if i in alpha:
+            p = alpha.find(i)
+            v = (p - y) % 26
+            z = alpha[v]
+            decrypted += z
+        else:
+            decrypted += i
+    print(decrypted)
+
+def userinput():
+    try:
+        a = input("Enter the Encrypted Code \n>>>>").lower()
+        key = 0
+        while key < 27:
+            decrypt(a, key)
+            key += 1
+    except KeyboardInterrupt:
+        print("Pressed CTRL + C \nExiting...")
+userinput()    
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