diff --git a/README.md b/README.md
index e38114c..b3ff34e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,57 @@
 generis-auth-ldap
 =================
+
+An LDAP implementation of the Tao user authentication
+
+Requirement
+=====================
+In order to use this system, you need to have an ldap server installed. It should have user in it. 
+Test have been maded with openldap. 
+I recommend a graphical client to use with, like phpldap admin 
+You can correct the bug of the 1.2.2-5ubuntu1 with the following process : 
+http://forums.debian.net/viewtopic.php?f=5&t=111508 
+
+
+
+
+Installation 
+============================
+
+This system can be added to a projet as a library. You need to add this parameter to your composer.json 
+
+    "minimum-stability" : "dev",
+    "repositories": [
+        {
+            "type": "vcs",
+            "url": "https://github.com/oat-sa/generis-auth-ldap"
+        }
+    ],
+    "require": {
+        "oat-sa/generis-auth-ldap": "*"
+    },
+
+Once it's done, run a composer update. 
+
+------------------------------
+
+To enable them, you need to go to generis/common/conf/auth.conf.php and add these lines 
+
+    array(
+        'driver' => 'oat\authLdap\model\LdapAdapter',
+        'config' => array(
+            array(
+                'host' => '127.0.0.1',
+                'accountDomainName' => 'test.com',
+                'username' => 'cn=admin,dc=test,dc=com',
+                'password' => 'admin',
+                'baseDn' => 'OU=organisation,dc=test,dc=com',
+                'bindRequiresDn' => 'true',
+            )
+        )
+    ),
+
+here the domain is test.com All the parameters are in a separate dc in ldap
+
+These are the configuration of the connection to the ldap server. 
+
+Then the login will try to use this library.