Add Week 3

kakom-ti/index.php

@@ -52,7 +52,7 @@ include "../includes/courses.php";
     <li><a href="syllabus.pdf">Syllabus</a></li>
     <li><a href="introduction_cryptography.pdf">Introduction to Cryptography</a></li>
     <li><a href="number_theory.pdf">Number Theory</a> - <a href="number-theory.zip.zip">Script</a></li>
-    <li>Classical Ciphers</li>
+    <li><a href="classical_ciphers.pdf">Classical Ciphers</a></li>
     <li>Symmetric Cryptography #1</li>
     <li>Symmetric Cryptography #2</li>        
     <li>Asymmetric Cryptography #1</li>