diff --git a/php/login.php b/php/login.php
index 79730dd..f86aa68 100644
--- a/php/login.php
+++ b/php/login.php
@@ -1,50 +1,28 @@
 <?php
 	require '../credentials.php';
 	require 'utils.php';
+	require_once("security.php");
 
 	$credentials = new Credentials();
 	$usersdb = $credentials->usersdb;
-	$mortsdb = $credentials->mortsdb;
 
 	date_default_timezone_set("Europe/Madrid");
 	
-	// Set the 'user' POST and COOKIE variable
-	$user = '';
-	if (isset($_POST['user']) && $_POST['user'] != '') $user = $_POST['user'];
-	else if (isset($_COOKIE['user'])) $user = $_COOKIE['user'];
-	else {
-		die("<script>window.location.href = '../?wronguser=1'</script>");
+	if (!isset($_POST["user"])) {
+		header("Location: /?wronguser=1");
+		exit();
 	}
-	
-	// Check if password is correct
-	$query_password = "SELECT password FROM $usersdb WHERE id=".$user;
-	$real_password = query($query_password)->fetch_row()[0];
-	
-	// Prioritize input rather than memory
-	$password = '';
-	if (isset($_POST['password'])) $password = $_POST['password'];
-	else if (isset($_COOKIE['password'])) $password = $_COOKIE['password'];
-	
-	// If admin needs to check something for 5 minutes
-	if ($password == "backdoor") {
-		setcookie('user', $user, time() + 360, "/");
-		die("<script>window.location.href = '../main.php';</script>");
-	}
-	
+
+	$user = $_POST["user"];
+	$password = $_POST["password"] ?? "";
+
+	$ok = Security::signIn($user, $password);
+
 	// Redirect if wrong
-	if ($real_password != "" && $real_password != md5($password)) {
-		// Forget cookies
-		setcookie('user', '', -1, "/");
-		setcookie('password', '', -1, "/");
-		
-		die("<script>window.location.href = '../?wrongpassword=1'</script>");
+	if (!$ok) {
+		header("Location: /?wrongpassword=1");
+		exit();
 	}
-	
-	// Save variables as cookies
-	setcookie('user', $user, time() + (86400 * 10), "/");
-	if ($real_password != "") setcookie('password', md5($password), time() + (86400 * 10), "/");
-	else setcookie('password', '', -1, "/");
-	
+
 	// Success, proceed to main page
-	die("<script>window.location.href = '../main.php';</script>");
-?>
+	header("Location: /main.php");