diff --git a/supysonic/scanner.py b/supysonic/scanner.py
index a4c0022..d00b76c 100644
--- a/supysonic/scanner.py
+++ b/supysonic/scanner.py
@@ -12,6 +12,7 @@ import mimetypes
 import mutagen
 import time
 
+from datetime import datetime
 from pony.orm import db_session
 
 from .covers import find_cover_in_folder, CoverFile
@@ -114,8 +115,9 @@ class Scanner:
             raise TypeError('Expecting string, got ' + str(type(path)))
 
         tr = Track.get(path = path)
+        mtime = int(os.path.getmtime(path)) if os.path.exists(path) else 0 # condition for some tests
         if tr is not None:
-            if not self.__force and not int(os.path.getmtime(path)) > tr.last_modification:
+            if not self.__force and not mtime > tr.last_modification:
                 return
 
             tag = self.__try_load_tag(path)
@@ -144,7 +146,7 @@ class Scanner:
 
         trdict['bitrate']  = int(tag.info.bitrate if hasattr(tag.info, 'bitrate') else os.path.getsize(path) * 8 / tag.info.length) // 1000
         trdict['content_type'] = mimetypes.guess_type(path, False)[0] or 'application/octet-stream'
-        trdict['last_modification'] = int(os.path.getmtime(path))
+        trdict['last_modification'] = mtime
 
         tralbum = self.__find_album(albumartist, album)
         trartist = self.__find_artist(artist)
@@ -154,6 +156,7 @@ class Scanner:
             trdict['folder'] = self.__find_folder(path)
             trdict['album'] = tralbum
             trdict['artist'] = trartist
+            trdict['created'] = datetime.fromtimestamp(mtime)
 
             Track(**trdict)
             self.__stats.added.tracks += 1
@@ -284,7 +287,8 @@ class Scanner:
             if folder is not None:
                 break
 
-            children.append(dict(root = False, name = os.path.basename(path), path = path))
+            created = datetime.fromtimestamp(os.path.getmtime(path))
+            children.append(dict(root = False, name = os.path.basename(path), path = path, created = created))
             path = os.path.dirname(path)
 
         assert folder is not None
diff --git a/supysonic/utils.py b/supysonic/utils.py
new file mode 100644
index 0000000..01b8f28
--- /dev/null
+++ b/supysonic/utils.py
@@ -0,0 +1,23 @@
+# coding: utf-8
+#
+# This file is part of Supysonic.
+# Supysonic is a Python implementation of the Subsonic server API.
+#
+# Copyright (C) 2019 Alban 'spl0k' Féron
+#
+# Distributed under terms of the GNU AGPLv3 license.
+
+from base64 import b64encode, b64decode
+from os import urandom
+from pony.orm import db_session, ObjectNotFound
+
+from supysonic.db import Meta
+
+@db_session
+def get_secret_key(keyname):
+    try:
+        key = b64decode(Meta[keyname].value)
+    except ObjectNotFound:
+        key = urandom(128)
+        Meta(key = keyname, value = b64encode(key).decode())
+    return key
diff --git a/supysonic/web.py b/supysonic/web.py
index 9120504..e773c99 100644
--- a/supysonic/web.py
+++ b/supysonic/web.py
@@ -14,12 +14,13 @@ import logging
 import mimetypes
 
 from flask import Flask
-from os import makedirs, path, urandom
+from os import makedirs, path
 from pony.orm import db_session
 
 from .config import IniConfig
 from .cache import Cache
 from .db import init_database
+from .utils import get_secret_key
 
 logger = logging.getLogger(__package__)
 
@@ -69,15 +70,7 @@ def create_application(config = None):
         makedirs(cache_path) # pragma: nocover
 
     # Read or create secret key
-    secret_path = path.join(cache_path, 'secret')
-    if path.exists(secret_path):
-        with io.open(secret_path, 'rb') as f:
-            app.secret_key = f.read()
-    else:
-        secret = urandom(128)
-        with io.open(secret_path, 'wb') as f:
-            f.write(secret)
-        app.secret_key = secret
+    app.secret_key = get_secret_key('cookies_secret')
 
     # Import app sections
     if app.config['WEBAPP']['mount_webui']: