diff --git a/base.cs b/base.cs
new file mode 100644
index 0000000..e50c85a
--- /dev/null
+++ b/base.cs
@@ -0,0 +1,124 @@
+using System;
+using System.Web;
+using System.Web.Security;
+using System.Web.UI;
+using System.Data;
+using MySql.Data.MySqlClient;
+using System.Data.Common;
+using System.Globalization;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace Meeting {
+	public class MyBase : Page {
+		
+		//
+		// Notice that am including this because Gonzalo forced me to!
+		//
+		
+		string create_table = "create table Meeting ( id int not null auto_increment primary key, name varchar(100) unique not null, email varchar(100) not null, country varchar (50) not null, comment blob not null, validated int default 0 );";
+
+		static string constr;
+		
+		static IDbConnection GetConnection ()
+		{
+			if (constr == null){
+				using (Stream str = File.OpenRead ("/etc/connection-string")){
+					Console.WriteLine ("reading");
+					constr = new StreamReader (str).ReadLine ();
+				}
+			}
+				
+			IDbConnection cnc = new MySqlConnection("Server=localhost; database=meeting;user id=miguel; Password=miguel;");
+			cnc.Open ();
+			return cnc;
+		}
+		
+		static IDbDataParameter CreateParameter (IDbCommand cmd, string name, string val)
+		{
+			IDbDataParameter par = cmd.CreateParameter ();
+			par.ParameterName = name;
+			par.Value = val;
+			par.DbType = DbType.String;
+			return par;
+		}
+		
+		
+		static int InsertNew (string name, string email, string country, string comment)
+		{
+			if (name == null || email == null || country == null || comment == null)
+				throw new ArgumentNullException ();
+		
+			using (IDbConnection cnc = GetConnection ()){
+				IDbCommand cmd = cnc.CreateCommand ();
+				//cmd.CommandText = "INSERT INTO Meeting set name = @name, email = @email, country = @country, comment = @comment ;";
+				cmd.CommandText = "INSERT INTO Meeting (name, email, country, comment) VALUES (?name, ?email, ?country, ?comment)";
+				cmd.Parameters.Add (CreateParameter (cmd, "?name", name));
+				cmd.Parameters.Add (CreateParameter (cmd, "?email", email));
+				cmd.Parameters.Add (CreateParameter (cmd, "?country", country));
+				cmd.Parameters.Add (CreateParameter (cmd, "?comment", comment));
+				try {
+					cmd.ExecuteNonQuery ();
+				} catch (MySqlException m){
+					// Duplicate entry 
+					if (m.Number != 1062)
+						throw;
+				}
+				cmd.Dispose ();
+				cmd = cnc.CreateCommand ();
+				cmd.CommandText = "SELECT id FROM Meeting WHERE name = ?name";
+				cmd.Parameters.Add (CreateParameter (cmd, "?name", name));
+				IDataReader reader = cmd.ExecuteReader ();
+				if (reader.Read () == false)
+					throw new Exception ("Reader.Read is false");
+				return (int) reader.GetValue (0);
+			}		
+		}
+
+		static string MakeHash (int number)
+		{
+			using (Stream s = File.OpenRead ("/etc/clave")){
+				byte [] buffer = new byte [100];
+				
+				int n = s.Read (buffer, 4, 96);
+				buffer [0] = (byte) (number & 0xff);
+				buffer [1] = (byte) ((number >> 8) & 0xff);
+				buffer [2] = (byte) ((number >> 16) & 0xff);
+				buffer [3] = (byte) ((number >> 24) & 0xff);
+	
+				byte [] hash = SHA1.Create ().ComputeHash (buffer, 0, n+4);
+				return Convert.ToBase64String (hash);
+			}
+		}
+			
+		static string GenerateToken (int idx)
+		{
+			return String.Format ("{0}:{1}", idx, HttpUtility.UrlEncode (MakeHash (idx)));
+		}
+		
+		public static void ValidateToken (string token)
+		{
+			int p = token.IndexOf (':');
+			if (p == -1)
+				throw new Exception ("Invalid token format");
+			int uid = (int) UInt32.Parse (token.Substring (0, p));
+			string hash = token.Substring (p+1);
+
+			if (MakeHash (uid) != hash)
+				throw new Exception ("Tampered token");
+
+		    	using (IDbConnection cnc = GetConnection ()){
+				IDbCommand cmd;
+				cmd = cnc.CreateCommand ();
+				cmd.CommandText = "UPDATE Meeting SET validated = 1 WHERE id = " + uid.ToString (CultureInfo.InvariantCulture);
+				cmd.ExecuteNonQuery ();
+			}
+		}
+		
+		public static string InsertData (string name, string email, string country, string comment)
+		{
+			int idx = InsertNew (name, email, country, comment);
+			return GenerateToken (idx);
+		}
+	}
+}
\ No newline at end of file
diff --git a/bin/MySql.Data.dll b/bin/MySql.Data.dll
new file mode 100644
index 0000000..1db932c
Binary files /dev/null and b/bin/MySql.Data.dll differ
diff --git a/confirm.aspx b/confirm.aspx
index 74515bd..3a342f0 100644
--- a/confirm.aspx
+++ b/confirm.aspx
@@ -4,12 +4,12 @@
 void Page_Load ()
 {
 	try {
-		if (DbValidate (Request.QueryString ["token"])){
-		   ok.Visible = true;
-		} else 
-	   	   error.Visible = true;
-        } catch {
-	  error.Visible = true;
+		ValidateToken (Request.QueryString ["token"]);
+		ok.Visible = true;
+        } catch (Exception e) {
+	        debug.InnerText = e.ToString ();
+	  	// Exception if the token does not decrypt properly
+		error.Visible = true;
 	}
 }
 
@@ -37,6 +37,7 @@ bool DbValidate (string s)
 
 	</div>
 
+	<div id="debug" style="display: none;" runat="server"/>
 </form>
 </div>
 </body>
\ No newline at end of file
diff --git a/header.inc b/header.inc
index 0c35a29..69b6f44 100644
--- a/header.inc
+++ b/header.inc
@@ -1,4 +1,4 @@
-<%@ Page Language="C#" %>
+<%@ Page Language="C#" Src="base.cs" Inherits="Meeting.MyBase" %>
 <%@ Import Namespace="System.Web" %>
 <%@ Import Namespace="System.Web.Mail" %>
 <html>
diff --git a/registration.aspx b/registration.aspx
index 9b78d59..beb8b74 100644
--- a/registration.aspx
+++ b/registration.aspx
@@ -8,16 +8,11 @@ void Page_Load ()
 	}
 	Page.Validate ();
 
-	string token = InsertRegister (name.Text, email.Text, country.Text, comments.Text);	
+	string token = InsertData (name.Text, email.Text, country.Text, comments.Text);	
 	mail (email.Text, token);
 	Response.Redirect ("thanks.aspx");
 }
 
-string InsertRegister (string name, string email, string country, string comments)
-{
-	return "token";
-}
-
 static void mail (string recipient, string token)
 {
      MailMessage m = new MailMessage ();