diff --git a/modules/.keys/laurentb.asc b/modules/.keys/laurentb.asc
new file mode 100644
index 00000000..c953e180
--- /dev/null
+++ b/modules/.keys/laurentb.asc
@@ -0,0 +1,193 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v2.0.17 (GNU/Linux)
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+bPK1o4AdSQG7jMx20F8fixE3a5dk1s+27bsGhTW4dkVN1rHI+vv87mcTaohAT3IK
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+ovxQ7FKvMhkOP5uyzP+FMZs5/0cAn2/Q3PELTnsZnZechhu+l/eK/kCw
+=8yy4
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/modules/.keys/romain.asc b/modules/.keys/romain.asc
new file mode 100644
index 00000000..993eb9f2
--- /dev/null
+++ b/modules/.keys/romain.asc
@@ -0,0 +1,33 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+Version: GnuPG v2.0.17 (GNU/Linux)
+
+mQENBEoOr78BCADAsCwWXDvedstjc9L3YSlXJ6KDd12WVD+iEiVGUqToJkWwp05k
+uVvvibhNxjDJzZqfWxBvfhFXkf/APF8PoTvkA4l51WOfPGSZejiKMcenij+3HjKa
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+MAyVPPCmwrCKdkrG4/xjlBo0Ghjwq4gH6ShclcdJlwjfBY/CLtv5voM+TxKZ2wg0
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+KiLhXstA/eNC3qC0IVJvbWFpbiBCaWdub24gPHJvbWFpbkBzeW1saW5rLm1lPokB
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+dsaajEWmPbUhaDre7gTtxPNJFs6FXksfquUiZySXA45R+XH8Qh/TWJAY8FjdaZwB
+tgOn4rka+n0rQeG1fklHw4Z3AREm/GmfeA63nkmS5SvdXskAz1iXB20Hyb6bGy5b
+Y7ZJNhJ8Ocz2THizc2od3Bx8Pzw3DHs+NaW5sK/NJJN9QgpdLA4lo0KeidCALEXF
+CReDEaT4Cs/Ds3u8QkuR+s+8qN5BOYcIWz79T/hLFw46SezEz9gjJ+NR1nIMd2um
+bwnyciYEGVOfG4DsU/IRwnbk+HWcLNTFnw==
+=mTlW
+-----END PGP PUBLIC KEY BLOCK-----
diff --git a/weboob/applications/weboobrepos/weboobrepos.py b/weboob/applications/weboobrepos/weboobrepos.py
index 205b2a11..1fac1e19 100644
--- a/weboob/applications/weboobrepos/weboobrepos.py
+++ b/weboob/applications/weboobrepos/weboobrepos.py
@@ -25,6 +25,7 @@ import tarfile
 import os
 import shutil
 import sys
+import subprocess
 from copy import copy
 from contextlib import closing
 
@@ -100,6 +101,36 @@ class WeboobRepos(ReplApplication):
 
         r.build_index(source_path, index_file)
 
+        if r.signed:
+            gpg = self._find_gpg()
+            if not gpg:
+                raise Exception('Unable to find the gpg executable.')
+            krname = os.path.join(repo_path, r.KEYRING)
+            if os.path.exists(krname):
+                kr_mtime = int(datetime.fromtimestamp(os.path.getmtime(krname)).strftime('%Y%m%d%H%M'))
+            if not os.path.exists(krname) or kr_mtime < r.key_update:
+                print 'Generate keyring'
+                # Remove all existing keys
+                if os.path.exists(krname):
+                    os.remove(krname)
+                # Add all valid keys
+                for keyfile in os.listdir(os.path.join(source_path, r.KEYDIR)):
+                    keypath = os.path.join(source_path, r.KEYDIR, keyfile)
+                    subprocess.check_call([gpg,
+                        '--no-default-keyring',
+                        '--keyring', krname,
+                        '--import', keypath])
+                # Does not make much sense in our case
+                if os.path.exists(krname+'~'):
+                    os.remove(krname+'~')
+                if not os.path.exists(krname):
+                    raise Exception('No valid key file found.')
+                kr_mtime = mktime(strptime(str(r.key_update), '%Y%m%d%H%M'))
+                os.utime(krname, (kr_mtime, kr_mtime))
+            else:
+                print 'Keyring is up to date'
+
+
         for name, module in r.modules.iteritems():
             tarname = os.path.join(repo_path, '%s.tar.gz' % name)
             module_path = os.path.join(source_path, name)
@@ -119,6 +150,16 @@ class WeboobRepos(ReplApplication):
             if os.path.exists(icon_path):
                 shutil.copy(icon_path, os.path.join(repo_path, '%s.png' % name))
 
+    @staticmethod
+    def _find_gpg():
+        if os.getenv('GPG_EXECUTABLE'):
+            return os.getenv('GPG_EXECUTABLE')
+        paths = os.getenv('PATH', os.defpath).split(os.pathsep)
+        for path in paths:
+            fpath = os.path.join(path, 'gpg')
+            if os.path.exists(fpath) and os.access(fpath, os.X_OK):
+                return fpath
+
     def _archive_excludes(self, filename):
         # Skip *.pyc files in tarballs.
         if filename.endswith('.pyc'):
diff --git a/weboob/core/repositories.py b/weboob/core/repositories.py
index 0247a0bd..15527d67 100644
--- a/weboob/core/repositories.py
+++ b/weboob/core/repositories.py
@@ -91,6 +91,8 @@ class RepositoryUnavailable(Exception):
 
 class Repository(object):
     INDEX = 'modules.list'
+    KEYDIR = '.keys'
+    KEYRING = 'trusted.gpg'
 
     def __init__(self, url):
         self.url = url
@@ -98,6 +100,8 @@ class Repository(object):
         self.update = 0
         self.maintainer = u''
         self.local = None
+        self.signed = False
+        self.key_update = 0
 
         self.modules = {}
 
@@ -170,6 +174,8 @@ class Repository(object):
             self.name = items['name']
             self.update = int(items['update'])
             self.maintainer = items['maintainer']
+            self.signed = bool(int(items.get('signed', '0')))
+            self.key_update = int(items.get('key_update', '0'))
         except KeyError, e:
             raise RepositoryUnavailable('Missing global parameters in repository: %s' % e)
         except ValueError, e:
@@ -203,10 +209,17 @@ class Repository(object):
         print 'Rebuild index'
         self.modules.clear()
 
+        if os.path.isdir(os.path.join(path, self.KEYDIR)):
+            self.signed = True
+            self.key_update = self.get_tree_mtime(os.path.join(path, self.KEYDIR), True)
+        else:
+            self.signed = False
+            self.key_update = 0
+
         sys.path.append(path)
         for name in sorted(os.listdir(path)):
             module_path = os.path.join(path, name)
-            if not os.path.isdir(module_path) or '.' in name:
+            if not os.path.isdir(module_path) or '.' in name or name == self.KEYDIR:
                 continue
 
             try:
@@ -252,6 +265,8 @@ class Repository(object):
         config.set(DEFAULTSECT, 'name', self.name)
         config.set(DEFAULTSECT, 'update', self.update)
         config.set(DEFAULTSECT, 'maintainer', self.maintainer)
+        config.set(DEFAULTSECT, 'signed', int(self.signed))
+        config.set(DEFAULTSECT, 'key_update', self.key_update)
         if private:
             config.set(DEFAULTSECT, 'url', self.url)