diff --git a/Brie/brie/config/ldap_config.py b/Brie/brie/config/ldap_config.py
index 7e9e735..64a3613 100644
--- a/Brie/brie/config/ldap_config.py
+++ b/Brie/brie/config/ldap_config.py
@@ -6,6 +6,7 @@ username_base_dn = "ou=membres,"
 room_base_dn = "ou=chambres,"
 group_base_dn = "ou=groupes,"
 parametres_base_dn = "ou=parametres,"
+machine_base_dn = "cn=machines,"
 ip_reservation_base_dn = "uid=pool_ip," + parametres_base_dn
 plugins_base_dn = "uid=plugins," + parametres_base_dn
 
diff --git a/Brie/brie/controllers/edit.py b/Brie/brie/controllers/edit.py
index f313560..09cb10f 100644
--- a/Brie/brie/controllers/edit.py
+++ b/Brie/brie/controllers/edit.py
@@ -161,7 +161,6 @@ class MachineAddController(AuthenticatedRestController):
         #endif
 
         # Génération de l'id de la machine et recherche d'une ip libre
-        machine_id = str(uuid.uuid4())
         ip = IpReservation.get_first_free(self.user, residence_dn)
 
         # Rendre l'ip prise 
@@ -169,7 +168,7 @@ class MachineAddController(AuthenticatedRestController):
         self.user.ldap_bind.add_attr(ip.dn, taken_attribute)
 
         # Attributs ldap de l'objet machine (regroupant dns et dhcp)
-        machine_top = Machine.entry_attr(machine_id)
+        machine_top = Machine.entry_attr(name)
 
         # Attributs ldap des objets dhcp et dns, fils de l'objet machine
         machine_dhcp = Machine.dhcp_attr(name, mac)
@@ -177,7 +176,7 @@ class MachineAddController(AuthenticatedRestController):
         
         # Construction du dn et ajout de l'objet machine 
         # en fils du membre (membre.dn)
-        machine_dn = "cn=" + machine_id + "," + member.dn
+        machine_dn = "cn=" + name + "," + ldap_config.machine_base_dn + member.dn
         self.user.ldap_bind.add_entry(machine_dn, machine_top)
 
         # Construction du dn et ajout de l'objet dhcp 
@@ -209,7 +208,7 @@ class MachineDeleteController(AuthenticatedRestController):
         # Note : on cherche la machine seulement sur le membre (member.dn)
         member = Member.get_by_uid(self.user, residence_dn, member_uid)
         machine = Machine.get_machine_by_id(self.user, member.dn, machine_id)
-        dns = Machine.get_dns_by_id(self.user, machine.dn, machine_id)
+        dns = Machine.get_dns_by_id(self.user, machine.dn)
         ip = IpReservation.get_ip(self.user, residence_dn, dns.dlzData.first())
 
         # Si la machine existe effectivement, on la supprime
diff --git a/Brie/brie/lib/ldap_helper.py b/Brie/brie/lib/ldap_helper.py
index 569ea06..fd2a525 100644
--- a/Brie/brie/lib/ldap_helper.py
+++ b/Brie/brie/lib/ldap_helper.py
@@ -4,13 +4,20 @@ import ldap
 
 from brie.config import ldap_config
 
+
+""" Classe de manipulation de la base ldap """
 class Ldap(object):
     __connection = None
 
+    """ Connexion à la base """
     def __init__(self, connection):
         self.__connection = connection
     #end def
     
+    """ Methode de connexion à la base de donnée
+        dn : dn de connexion
+        password : mot de passe
+    """
     @staticmethod
     def connect(dn, password):
         connection = None
@@ -28,6 +35,11 @@ class Ldap(object):
         return None
     #end def
 
+    """ Recherche sur la base
+        dn : base de recherche
+        filter : filtre ldap de recherche
+        scope : portée de recherche (SCOPE_SUBTREE, SCOPE_BASE, SCOPE_ONELEVEL)
+    """
     def search(self, dn, filter, scope = ldap.SCOPE_SUBTREE):
         try:
             results = self.__connection.search_s(dn, scope, filter)
@@ -45,17 +57,20 @@ class Ldap(object):
             for attribute in attributes.iteritems():
                 name = attribute[0]
                 values = attribute[1]
-                ldap_value = LdapValue(name, values)
+                ldap_value = LdapAttribute(name, values)
                 val_dict[name] = ldap_value
             #end for
             
-            ldap_result = LdapResult(result_dn, val_dict)
+            ldap_result = LdapEntry(result_dn, val_dict)
             ldap_results.append(ldap_result)
         #end for
 
         return ldap_results
     #end def
 
+    """ Recherche le premier resultat sur la base
+        appel la methode "search" en interne
+    """
     def search_first(self, dn, filter, scope = ldap.SCOPE_SUBTREE):
         results = self.search(dn, filter, scope)
         if results is None: return None
@@ -67,9 +82,14 @@ class Ldap(object):
         return None
     #end def
 
+    """ Recherche seulement l'element décrit par le dn donnée """
     def search_dn(self, dn):
         return self.search_first(dn, "(objectClass=*)", ldap.SCOPE_BASE)
 
+    """ Remplace les attributs d'un dn donné
+        dn : adresse de l'élément
+        attributes : dictionnaire d'attributs 
+    """
     def replace_attr(self, dn, attributes):
         modlist = []
         for attribute in attributes.iteritems():
@@ -78,6 +98,10 @@ class Ldap(object):
         self.__connection.modify_s(dn, modlist)
     #end def
 
+    """ Ajouter les attributs d'un dn donné
+        dn : addresse de l'élément
+        attributes : dictionnaire des nouveaux attributs
+    """
     def add_attr(self, dn, attributes):
         modlist = []
         for attribute in attributes.iteritems():
@@ -89,6 +113,10 @@ class Ldap(object):
             pass
     #end def
 
+    """ Supprime les attributs d'un dn donné 
+        dn : adresse de l'élément
+        attributes : dictionnaire des attributs à supprimer
+    """
     def delete_attr(self, dn, attributes):
         modlist = []
         for attribute in attributes.iteritems():
@@ -100,6 +128,10 @@ class Ldap(object):
         #    pass
     #end def
 
+    """ Ajoute un nouvelle élément 
+        dn : adresse du nouvelle élément
+        attributes : dictionnaire des attributes de l'élément
+    """
     def add_entry(self, dn, attributes):
         modlist = []
         for attribute in attributes.iteritems():
@@ -112,6 +144,7 @@ class Ldap(object):
         ##    pass
     #end def
 
+    """ Supprime un élement donné """
     def delete_entry(self, dn):
         #try:
         self.__connection.delete_s(dn)
@@ -119,6 +152,7 @@ class Ldap(object):
         #    pass
     #end def
 
+    """ Supprime récursivement un élément et ses fils """
     def delete_entry_subtree(self, dn):
         entries = self.search(dn, "(objectClass=*)")
         for entry in reversed(entries):
@@ -126,26 +160,84 @@ class Ldap(object):
         #end for
     #end def
 
+    """ Renomme un élément """
     def rename_entry(self, dn, newdn, superior):
         self.__connection.rename_s(dn, newdn, newsuperior= superior)
 
+    """ Sauvegarde en base une valeur l'élément donné """
+    def save(self, ldap_entry):
+        modlist = []
+
+        for global_deletion in ldap_entry._deletions:
+            modlist.append((ldap.MOD_DELETE, global_deletion, NONE))
+        #end for
+        ldap_entry._deletions = []
+
+        ldap_attributes = (
+            attribute 
+            for attribute in ldap_entry.__dict__.itervalues()
+            if isinstance(attribute, LdapAttribute)
+        )
+
+        for ldap_attribute in ldap_attributes:
+            print "name : " + ldap_attribute.name
+            print "values : " + str(ldap_attribute.values)
+            print "deletions : " + str(ldap_attribute._deletions)
+            print "additions : " + str(ldap_attribute._additions)
+            print  "modified : " + str(ldap_attribute._modified)
+            
+            if ldap_attribute._deletions != []:
+                modlist.append((ldap.MOD_DELETE, ldap_attribute.name, ldap_attribute._deletions))
+                ldap_attribute._deletions = []
+            #end if
+
+            if ldap_attribute._additions != []:
+                modlist.append((ldap.MOD_ADD, ldap_attribute.name, ldap_attribute._additions))
+                ldap_attribute._additions = []
+            #end if
+
+            if ldap_attribute._modified:
+                str_values = [str(value) for value in ldap_attribute.values]
+                modlist.append((ldap.MOD_REPLACE, ldap_attribute.name, str_values))
+                ldap_attribute._modified = False
+            #end for
+
+
+        #end for
+
+        print "dn : " +  ldap_entry.dn
+        print "modlist : " + str(modlist)
+        if modlist != []:
+            self.__connection.modify_s(ldap_entry.dn, modlist)
+
+        # On recharge l'entrée après la sauvegarde
+        entry_reloaded = self.search_dn(ldap_entry.dn)
+        ldap_entry.__dict__ = entry_reloaded.__dict__
+    #end def
+
+    """ Ferme la connexion à la base """
     def close(self):
         self.__connection.unbind()
             
 #end class
 
-class LdapResult(object):
+""" Classe représentant un élément ldap """
+class LdapEntry(object):
     dn = None    
 
+    _deletions = []
+
     def __init__(self, dn, var_dict):
         self.__dict__ = var_dict
         self.dn = dn.decode("utf-8")
     #end def
 
+    """ Retourne si un attribut existe sur cette élément """
     def has(self, attribute_name):
         return attribute_name in self.__dict__
     #end def
 
+    """ Retourne la valeur d'un attribut donné """
     def get(self, name):
         if name in self.__dict__:
             return self.__dict__[name]
@@ -158,23 +250,127 @@ class LdapResult(object):
         return None
     #end def
 
+    """ Ajoute un attribut """
+    def add(self, name, value = None):
+        if self.has(name):
+            if value is not None:
+                value = self.get(name)
+                value.add(value)
+            #end if
+        else:
+            values = []
+            if value is not None:
+                values = [value]
+            #end if
+
+            
+            self.__dict__[name] = LdapAttribute(name, values)
+            self.__dict__[name]._additions = values
+        #end if
+    #end def
+
+    """ Supprime un attribut """
+    def delete(self, name, value = None):
+        if self.has(name):
+            if value is not None:
+                value = self.get(name)
+                value.delete(value)
+            else:
+                del self.__dict__[name]
+                self._deletions.append(name)
+            #end if
+        #end if
+    #end def
+
 #end class
 
-class LdapValue(object):
+
+""" Classe représentant la valeur d'un attribut """
+class LdapAttribute(object):
     name = None
-    values = []
+    values = None
+
+    _deletions = None
+    _additions = None
+    _modified = False
 
     def __init__(self, name, values):
         self.values = [value.decode("utf-8") for value in values]
         self.name = name
+
+        self._deletions = list()
+        self._additions = list()
     #end def
 
+    """ Retourne la première valeur de cet attribut """
     def first(self, default = None):
         for value in self.values:
-            return value
+            return unicode(value)
         #end for
         
-        return default
+        return unicode(default)
+    #end def
+
+    """ Retourne toutes les valeurs de cet attribut """
+    def all(self):
+        return self.values
+    #end def
+
+    """ Ajoute une valeur à cet attribut
+        Note : la valeur ne sera pas ajouté si elle existe déjà 
+    """
+    def add(self, value):
+        if not value in self.values:
+            self.values.append(value)
+            self._additions.append(value)
+        #end if
+    #end def 
+
+    """ Supprime une valeur de cet attribut """
+    def delete(self, value):    
+        if value in self.values:
+            self.values = [old for old in self.values if old != value]
+
+            # Si il vient d'être ajouté, on l'enleve simplement 
+            # de la queue d'ajout
+            # sinon on l'ajoute dans la queue de suppression
+            if value in self._additions:
+                self._additions = [old for old in self._additions if old != value]
+            else:
+                self._deletions.append(value)
+            #end if
+        #end if
+    #end def
+
+    """ Modifie une valeur de cet attribut
+        si la valeur est nulle, modifie la première valeur
+    """
+    def replace(self, old, new):
+
+        # Fonction usuelle de remplacement
+        def replace(current):
+            if current == old:
+                return new
+            #end if
+
+            return current
+        #end def
+
+        # Si la valeur modifié existe déjà
+        # l'ancienne valeur n'est que supprimée
+        if new in self.values:
+            self.delete(old)
+        else:
+            self.values = [replace(value) for value in self.values]
+
+            # Si la valeur modifié vient d'être ajouté, 
+            # elle est modifié dans la queue d'addition
+            self._additions = [replace(value) for value in self._additions]
+        
+            self._modified = True
+        #end if
+
+
     #end def
 #end class
     
diff --git a/Brie/brie/model/ldap.py b/Brie/brie/model/ldap.py
index 551614f..56928ad 100644
--- a/Brie/brie/model/ldap.py
+++ b/Brie/brie/model/ldap.py
@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 
+from __future__ import absolute_import
 from brie.config import ldap_config
+import ldap
 
 class Member(object):
   
@@ -130,7 +132,7 @@ class Machine(object):
     def dhcp_attr(name, mac):
         return {
             "objectClass" : ["top", "uidObject", "dhcpHost"],
-            "cn" : str(name),
+            "cn" : "dhcp",
             "uid" : "machine_membre",
             "dhcpHWAddress" : str("ethernet " + mac),
             "dhcpStatements" : str("fixed-address " + name)
@@ -140,7 +142,8 @@ class Machine(object):
     @staticmethod
     def dns_attr(name, ip):
         return {
-            "objectClass" : ["top", "dlzAbstractRecord", "dlzGenericRecord"],
+            "objectClass" : ["top", "organizationalRole", "dlzAbstractRecord", "dlzGenericRecord"],
+            "cn" : "dns",
             "dlzData" : str(ip),
             "dlzHostName" : str(name),
             "dlzRecordId" : "1",
@@ -153,7 +156,7 @@ class Machine(object):
     def auth_attr(flat_mac):
         return {
             "objectClass" : ["top", "organizationalRole", "simpleSecurityObject", "uidObject"],
-            "cn" : "mac",
+            "cn" : "mac_auth",
             "uid" : flat_mac,
             "userPassword" : flat_mac
         }
@@ -161,7 +164,8 @@ class Machine(object):
 
     @staticmethod
     def get_machine_tuples_of_member(user_session, member_dn):
-        results = user_session.ldap_bind.search(member_dn, "(objectClass=organizationalRole)")
+        machine_dn = ldap_config.machine_base_dn + member_dn
+        results = user_session.ldap_bind.search(machine_dn, "(objectClass=organizationalRole)", scope = ldap.SCOPE_ONELEVEL)
         machines = list()
         for result in results:
             dhcp = user_session.ldap_bind.search_first(result.dn, "(objectClass=dhcpHost)")
@@ -170,10 +174,9 @@ class Machine(object):
                 mac = dhcp.dhcpHWAddress.first().replace("ethernet ", "")
                 machines.append(
                     (
-                        dhcp.cn.first(), 
+                        result.cn.first(), 
                         mac, 
-                        dns.dlzData.first(), 
-                        result.cn.first()
+                        dns.dlzData.first() 
                     ) #tuple
                 ) 
             #end if
@@ -184,11 +187,12 @@ class Machine(object):
 
     @staticmethod
     def get_machine_by_id(user_session, member_dn, machine_id):
-        return user_session.ldap_bind.search_first(member_dn, "(cn=" + machine_id + ")")
+        machines_dn = ldap_config.machine_base_dn + member_dn
+        return user_session.ldap_bind.search_first(machines_dn, "(cn=" + machine_id + ")")
     #end def
 
     @staticmethod
-    def get_dns_by_id(user_session, machine_dn, machine_id):
+    def get_dns_by_id(user_session, machine_dn):
         return user_session.ldap_bind.search_first(machine_dn, "(objectClass=dlzAbstractRecord)")
     #end def
 
diff --git a/Brie/brie/templates/edit/member_room_interface_edit_views.html b/Brie/brie/templates/edit/member_room_interface_edit_views.html
index 949b47f..c8d9c8e 100644
--- a/Brie/brie/templates/edit/member_room_interface_edit_views.html
+++ b/Brie/brie/templates/edit/member_room_interface_edit_views.html
@@ -62,13 +62,13 @@
         </div>
         <div class="section">
             <span class="section_name show_section_name">MACHINES</span>
-            <div py:for="name, mac, ip, id  in machines">
+            <div py:for="name, mac, ip in machines">
                 <span class="item_name">${name}</span>
                 <span>${mac} : ${ip}</span>
                 <form action="/edit/machine/delete/" method="post" class="inline_block">
                     <input type="hidden" name="residence" value="${residence}"/>
                     <input type="hidden" name="member_uid" value="${member_ldap.uid.first()}"/>
-                    <input type="hidden" name="machine_id" value="${id}"/>
+                    <input type="hidden" name="machine_id" value="${name}"/>
                     <input type="submit" value="X" class="button"/>
                 </form>
             </div>