diff --git a/dialog.py b/dialog.py
new file mode 100755
index 0000000..836dbcc
--- /dev/null
+++ b/dialog.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+import argparse, os, sys
+from shutil import copyfile
+if not os.path.isfile("userEnv.py"):
+  copyfile("userEnv.py.template", "userEnv.py")
+try:
+    from userEnv import dunikey, pod
+except:
+    sys.stderr.write("Please fill the path to your private key (PubSec), and a Cesium ES address in userEnv.py\n")
+    sys.exit(1)
+from lib.cesiumMessaging import ReadCesium
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument('-n', '--number',type=int, default=3, help="Affiche les NUMBER derniers messages")
+parser.add_argument('-o', '--outbox', action='store_true', help="Lecture des messages envoyés")
+args = parser.parse_args()
+
+
+messages = ReadCesium(dunikey, pod)
+messages.read(args.number, args.outbox)
+
+# For debug, print complete JSON answer
+# print(messages.sendDocument(args.number, args.outbox))
diff --git a/lib/cesiumMessaging.py b/lib/cesiumMessaging.py
new file mode 100755
index 0000000..984739d
--- /dev/null
+++ b/lib/cesiumMessaging.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python3
+
+import os, sys, requests, json, base58, base64
+from natools import fmt, sign, get_privkey, box_decrypt
+from datetime import datetime
+
+
+class ReadCesium:
+    def __init__(self, dunikey, pod):
+        # Get my pubkey from my private key
+        try:
+            self.dunikey = dunikey
+        except:
+            sys.stderr.write("Please fill the path to your private key (PubSec)\n")
+            sys.exit(1)
+
+        self.recipient = get_privkey(dunikey, "pubsec").pubkey
+        self.pod = pod
+
+    # Configure JSON document to send
+    def configDoc(self, nbrMsg, outbox):
+        if outbox:
+            boxType = "issuer"
+        else:
+            boxType = "recipient"
+
+        return {
+        "sort": { "time": "desc" },
+        "from": 0,
+        "size": nbrMsg,
+        "_source":[
+            "issuer",
+            "recipient",
+            "title",
+            "content",
+            "time",
+            "nonce",
+            "read_signature"
+        ],"query":{
+            "bool":{
+                "filter":{
+                    "term":{
+                        boxType: self.recipient
+                    }
+                }
+            }
+            }
+        }
+
+
+    def sendDocument(self, nbrMsg, outbox):
+        if outbox:
+            boxType = "outbox"
+        else:
+            boxType = "inbox"
+
+        document = json.dumps(self.configDoc(nbrMsg, outbox))
+        headers = {
+            'Content-type': 'application/json',
+        }
+
+        # Send JSON document and get JSON result
+        brut = requests.post('{0}/message/{1}/_search'.format(self.pod, boxType), headers=headers, data=document).json()["hits"]
+        return brut
+
+    # Parse JSON result and display messages
+    def readMessages(self, msgJSON):
+        # Get terminal size
+        rows = int(os.popen('stty size', 'r').read().split()[1])
+
+        self.total = msgJSON["total"]
+        infoTotal = "  Nombre de messages: " + str(self.total) + "  "
+        print(infoTotal.center(rows, '#'))
+        for hits in msgJSON["hits"]:
+            self.idMsg = hits["_id"]
+            msgSrc = hits["_source"]
+            self.issuer = msgSrc["issuer"]
+            nonce = msgSrc["nonce"]
+            nonce = base58.b58decode(nonce)
+            self.title = base64.b64decode(msgSrc["title"])
+            self.title = box_decrypt(self.title, get_privkey(self.dunikey, "pubsec"), self.issuer, nonce).decode()
+            self.content = base64.b64decode(msgSrc["content"])
+            self.content = box_decrypt(self.content, get_privkey(self.dunikey, "pubsec"), self.issuer, nonce).decode()
+            self.dateS = msgSrc["time"]
+            date = datetime.fromtimestamp(self.dateS).strftime(", le %d/%m/%Y à %H:%M  ")
+            headerMsg = "  De " + self.issuer + date + "(ID: {})".format(self.idMsg)
+
+            print('-'.center(rows, '-'))
+            print(headerMsg.center(rows, '-'))
+            print('-'.center(rows, '-'))
+            print("Objet: " + self.title)
+            print(self.content)
+
+
+    def read(self, nbrMsg, outbox):
+        jsonMsg = self.sendDocument(nbrMsg, outbox)
+        self.readMessages(jsonMsg)
+
diff --git a/readmsg.py b/readmsg.py
deleted file mode 100755
index 6acaf83..0000000
--- a/readmsg.py
+++ /dev/null
@@ -1,65 +0,0 @@
-#!/usr/bin/env python3
-
-import os, sys, requests, json, base58, base64
-from userEnv import dunikey, pod
-from natools import fmt, sign, get_privkey, box_decrypt
-from datetime import datetime
-
-rows = int(os.popen('stty size', 'r').read().split()[1])
-
-#recipient = sys.argv[1]
-recipient = get_privkey(dunikey, "pubsec").pubkey
-nbrMsg = 5
-boxType = "inbox"
-
-def configDoc(recipient, nbrMsg):
-    return {
-    "sort": { "time": "desc" },
-    "from": 0,
-    "size": nbrMsg,
-    "_source":[
-        "issuer",
-        "recipient",
-        "title",
-        "content",
-        "time",
-        "nonce",
-        "read_signature"
-    ],"query":{
-        "bool":{
-            "filter":{
-                "term":{
-                    "recipient": recipient
-                }
-            }
-        }
-    }
-}
-document = json.dumps(configDoc(recipient, nbrMsg))
-# print(json.dumps(document))
-
-headers = {
-    'Content-type': 'application/json',
-}
-msgJSON = requests.post('{0}/message/{1}/_search'.format(pod, boxType), headers=headers, data=document).json()["hits"]
-
-total = msgJSON["total"]
-for hits in msgJSON["hits"]:
-    isMsg = hits["_id"]
-    msgSrc = hits["_source"]
-    issuer = msgSrc["issuer"]
-    nonce = msgSrc["nonce"]
-    nonce = base58.b58decode(nonce)
-    title = base64.b64decode(msgSrc["title"])
-    title = box_decrypt(title, get_privkey(dunikey, "pubsec"), issuer, nonce).decode()
-    content = base64.b64decode(msgSrc["content"])
-    content = box_decrypt(content, get_privkey(dunikey, "pubsec"), issuer, nonce).decode()
-
-    date = datetime.fromtimestamp(msgSrc["time"]).strftime(", le %d/%m/%Y à %H:%M  ")
-
-    headerMsg = "  De " + issuer + date
-    print('-'.center(rows, '-'))
-    print(headerMsg.center(rows, '-'))
-    print('-'.center(rows, '-'))
-    print("Objet: " + title)
-    print(content)
\ No newline at end of file