added hashing to prevent client side data tampering to sessions
diff --git a/user_guide/installation/index.html b/user_guide/installation/index.html
index 336f758..e925c21 100644
--- a/user_guide/installation/index.html
+++ b/user_guide/installation/index.html
@@ -62,7 +62,7 @@
<ol>
<li>Unzip the package.</li>
<li>Upload the CodeIgniter folders and files to your server. Normally the index.php file will be at your root.</li>
-<li>Open the <dfn>application/config/config.php</dfn> file with a text editor and set your base URL.</li>
+<li>Open the <dfn>application/config/config.php</dfn> file with a text editor and set your base URL. If you intend to use encryption or sessions, set your encryption key.</li>
<li>If you intend to use a database, open the <dfn>application/config/database.php</dfn> file with a text editor and set your database settings.</li>
</ol>