diff --git a/Dockerfile b/Dockerfile
index 00fcfc7f..72af1bb0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,4 +10,6 @@ COPY src /usr/src
 ENV PORT=80
 EXPOSE 80
 
+VOLUME /var/lib/auth-server
+
 CMD ["node", "index.js"]
diff --git a/docker-compose.dev.yml b/docker-compose.dev.yml
index bd439c02..00074863 100644
--- a/docker-compose.dev.yml
+++ b/docker-compose.dev.yml
@@ -3,6 +3,7 @@ version: '2'
 services:
   auth:
     volumes:
+      - ./test:/usr/src/test
       - ./src/views:/usr/src/views
       - ./src/public_html:/usr/src/public_html
 
diff --git a/docker-compose.yml b/docker-compose.yml
index d9ea01a7..1c18c832 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,6 +9,7 @@ services:
       - TOTP_SECRET=GRWGIJS6IRHVEODVNRCXCOBMJ5AGC6ZE
       - SESSION_SECRET=unsecure_secret
       - SESSION_EXPIRATION_TIME=3600000
+      - STORE_DIRECTORY=/var/lib/auth-server
     depends_on:
       - ldap
     restart: always
diff --git a/package.json b/package.json
index e62f951e..ac5bb057 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "unit-test": "./node_modules/.bin/mocha --recursive test/unitary",
     "int-test": "./node_modules/.bin/mocha --recursive test/integration",
     "all-test": "./node_modules/.bin/mocha --recursive test",
-    "coverage": "./node_modules/.bin/istanbul cover _mocha -- -R spec"
+    "coverage": "./node_modules/.bin/istanbul cover _mocha -- -R spec --recursive test"
   },
   "repository": {
     "type": "git",
@@ -27,6 +27,7 @@
     "express": "^4.14.0",
     "express-session": "^1.14.2",
     "ldapjs": "^1.0.1",
+    "nedb": "^1.8.0",
     "object-path": "^0.11.3",
     "speakeasy": "^2.0.0",
     "winston": "^2.3.1"
@@ -36,6 +37,7 @@
     "request": "^2.79.0",
     "should": "^11.1.1",
     "sinon": "^1.17.6",
-    "sinon-promise": "^0.1.3"
+    "sinon-promise": "^0.1.3",
+    "tmp": "0.0.31"
   }
 }
diff --git a/src/index.js b/src/index.js
index 6e164ccf..9ba2c02f 100644
--- a/src/index.js
+++ b/src/index.js
@@ -10,7 +10,8 @@ var config = {
   ldap_url: process.env.LDAP_URL || 'ldap://127.0.0.1:389',
   ldap_users_dn: process.env.LDAP_USERS_DN,
   session_secret: process.env.SESSION_SECRET,
-  session_max_age: process.env.SESSION_MAX_AGE || 3600000 // in ms
+  session_max_age: process.env.SESSION_MAX_AGE || 3600000, // in ms
+  store_directory: process.env.STORE_DIRECTORY
 }
 
 var ldap_client = ldap.createClient({
diff --git a/src/lib/routes/second_factor.js b/src/lib/routes/second_factor.js
index 7b0933c6..1c5f72e4 100644
--- a/src/lib/routes/second_factor.js
+++ b/src/lib/routes/second_factor.js
@@ -1,8 +1,6 @@
 
-var user_key_container = {};
 var denyNotLogged = require('./deny_not_logged');
-var u2f = require('./u2f')(user_key_container); // create a u2f handler bound to
-// user key container
+var u2f = require('./u2f'); 
 
 module.exports = {
   totp: denyNotLogged(require('./totp')),
diff --git a/src/lib/routes/u2f.js b/src/lib/routes/u2f.js
index 941f7306..6cca442e 100644
--- a/src/lib/routes/u2f.js
+++ b/src/lib/routes/u2f.js
@@ -1,11 +1,9 @@
 
-module.exports = function(user_key_container) {
-  return {
-    register_request: register_request,
-    register: register(user_key_container),
-    sign_request: sign_request(user_key_container),
-    sign: sign(user_key_container),
-  }
+module.exports = {
+  register_request: register_request,
+  register: register,
+  sign_request: sign_request,
+  sign: sign,
 }
 
 var objectPath = require('object-path');
@@ -26,15 +24,18 @@ function replyWithUnauthorized(res) {
   res.send();
 }
 
+function extractAppId(req) {
+  return util.format('https://%s', req.headers.host);
+}
 
 function register_request(req, res) {
   var u2f = req.app.get('u2f');
   var logger = req.app.get('logger');
-  var app_id = util.format('https://%s', req.headers.host);
+  var appid = extractAppId(req);
 
   logger.debug('U2F register_request: headers=%s', JSON.stringify(req.headers));
   logger.info('U2F register_request: Starting registration');
-  u2f.startRegistration(app_id, [])
+  u2f.startRegistration(appid, [])
   .then(function(registrationRequest) {
     logger.info('U2F register_request: Sending back registration request');
     req.session.auth_session.register_request = registrationRequest;
@@ -46,99 +47,125 @@ function register_request(req, res) {
   });
 }
 
-function register(user_key_container) {
-  return function(req, res) {
-    if(!objectPath.has(req, 'session.auth_session.register_request')) {
-      replyWithUnauthorized(res); 
-      return; 
-    }
-
-    var u2f = req.app.get('u2f');
-    var registrationRequest = req.session.auth_session.register_request;
-    var logger = req.app.get('logger');
-
-    logger.info('U2F register: Finishing registration');
-    logger.debug('U2F register: register_request=%s', JSON.stringify(registrationRequest));
-    logger.debug('U2F register: body=%s', JSON.stringify(req.body));
-
-    u2f.finishRegistration(registrationRequest, req.body)
-    .then(function(registrationStatus) {
-      logger.info('U2F register: Store registration and reply');
-      var meta = {
-        keyHandle: registrationStatus.keyHandle,
-        publicKey: registrationStatus.publicKey,
-        certificate: registrationStatus.certificate
-      }
-      user_key_container[req.session.auth_session.userid] = meta;
-      res.status(204);
-      res.send();
-    }, function(err) {
-      logger.error('U2F register: %s', err);
-      replyWithInternalError(res, 'Unable to complete the registration');
-    });
+function register(req, res) {
+  if(!objectPath.has(req, 'session.auth_session.register_request')) {
+    replyWithUnauthorized(res); 
+    return; 
   }
-}
 
-function userKeyExists(req, user_key_container) {
-  return req.session.auth_session.userid in user_key_container;
-}
+  var user_data_storage = req.app.get('user data store');
+  var u2f = req.app.get('u2f');
+  var registrationRequest = req.session.auth_session.register_request;
+  var userid = req.session.auth_session.userid;
+  var appid = extractAppId(req);
+  var logger = req.app.get('logger');
 
+  logger.info('U2F register: Finishing registration');
+  logger.debug('U2F register: register_request=%s', JSON.stringify(registrationRequest));
+  logger.debug('U2F register: body=%s', JSON.stringify(req.body));
 
-
-function sign_request(user_key_container) {
-  return function(req, res) {
-    if(!userKeyExists(req, user_key_container)) {
-      replyWithMissingRegistration(res);
-      return;
+  u2f.finishRegistration(registrationRequest, req.body)
+  .then(function(registrationStatus) {
+    logger.info('U2F register: Store registration and reply');
+    var meta = {
+      keyHandle: registrationStatus.keyHandle,
+      publicKey: registrationStatus.publicKey,
+      certificate: registrationStatus.certificate
     }
-  
-    var logger = req.app.get('logger');
-    var u2f = req.app.get('u2f');
-    var key = user_key_container[req.session.auth_session.userid];
-    var app_id = util.format('https://%s', req.headers.host);
+    user_data_storage.set_u2f_meta(userid, appid, meta);
+    res.status(204);
+    res.send();
+  }, function(err) {
+    logger.error('U2F register: %s', err);
+    replyWithInternalError(res, 'Unable to complete the registration');
+  });
+}
 
-    logger.info('U2F sign_request: Start authentication');
-    u2f.startAuthentication(app_id, [key])
+function retrieveU2fMeta(req, user_data_storage) {
+  var userid = req.session.auth_session.userid;
+  var appid = extractAppId(req);
+  return user_data_storage.get_u2f_meta(userid, appid);
+}
+
+function startU2fAuthentication(u2f, appid, meta) {
+  return new Promise(function(resolve, reject) {
+    u2f.startAuthentication(appid, [meta])
     .then(function(authRequest) {
-      logger.info('U2F sign_request: Store authentication request and reply');
-      req.session.auth_session.sign_request = authRequest;
-      res.status(200);
-      res.json(authRequest);
+      resolve(authRequest);
     }, function(err) {
-      logger.info('U2F sign_request: %s', err);
-      replyWithUnauthorized(res);
+      reject(err);
     });
-  }
+  });
 }
 
-function sign(user_key_container) {
-  return function(req, res) {
-    if(!userKeyExists(req, user_key_container)) {
+function finishU2fAuthentication(u2f, authRequest, data, meta) {
+  return new Promise(function(resolve, reject) {
+    u2f.finishAuthentication(authRequest, data, [meta])
+    .then(function(authenticationStatus) {
+      resolve(authenticationStatus);
+    }, function(err) {
+      reject(err);
+    })
+  });
+}
+
+function sign_request(req, res) {
+  var logger = req.app.get('logger');
+  var user_data_storage = req.app.get('user data store');
+
+  retrieveU2fMeta(req, user_data_storage)
+  .then(function(doc) {
+    if(!doc) {
       replyWithMissingRegistration(res);
       return;
     }
 
-    if(!objectPath.has(req, 'session.auth_session.sign_request')) {
-      replyWithUnauthorized(res); 
-      return; 
-    }
-  
-    var logger = req.app.get('logger');
+    var u2f = req.app.get('u2f');
+    var meta = doc.meta;
+    var appid = extractAppId(req);
+    logger.info('U2F sign_request: Start authentication');
+    return startU2fAuthentication(u2f, appid, meta);
+  })
+  .then(function(authRequest) {
+    logger.info('U2F sign_request: Store authentication request and reply');
+    req.session.auth_session.sign_request = authRequest;
+    res.status(200);
+    res.json(authRequest);
+  })
+  .catch(function(err) {
+    logger.info('U2F sign_request: %s', err);
+    replyWithUnauthorized(res);
+  });
+}
+
+
+function sign(req, res) {
+  if(!objectPath.has(req, 'session.auth_session.sign_request')) {
+    replyWithUnauthorized(res); 
+    return; 
+  }
+
+  var logger = req.app.get('logger');
+  var user_data_storage = req.app.get('user data store');
+
+  retrieveU2fMeta(req, user_data_storage)
+  .then(function(doc) {
+    var appid = extractAppId(req);
     var u2f = req.app.get('u2f');
     var authRequest = req.session.auth_session.sign_request;
-    var key = user_key_container[req.session.auth_session.userid];
-  
+    var meta = doc.meta;
     logger.info('U2F sign: Finish authentication');
-    u2f.finishAuthentication(authRequest, req.body, [key])
-    .then(function(authenticationStatus) {
-      logger.info('U2F sign: Authentication successful');
-      req.session.auth_session.second_factor = true;
-      res.status(204);
-      res.send();
-    }, function(err) {
-      logger.error('U2F sign: %s', err);
-      res.status(401);
-      res.send();
-    });
-  }
+    return finishU2fAuthentication(u2f, authRequest, req.body, meta);
+  })
+  .then(function(authenticationStatus) {
+    logger.info('U2F sign: Authentication successful');
+    req.session.auth_session.second_factor = true;
+    res.status(204);
+    res.send();
+  }, function(err) {
+    logger.error('U2F sign: %s', err);
+    res.status(401);
+    res.send();
+  });
 }
+
diff --git a/src/lib/server.js b/src/lib/server.js
index 750c625f..3c01a297 100644
--- a/src/lib/server.js
+++ b/src/lib/server.js
@@ -11,10 +11,14 @@ var speakeasy = require('speakeasy');
 var path = require('path');
 var session = require('express-session');
 var winston = require('winston');
+var DataStore = require('nedb');
+var UserDataStore = require('./user_data_store');
 
 function run(config, ldap_client, u2f, fn) {
   var view_directory = path.resolve(__dirname, '../views');
   var public_html_directory = path.resolve(__dirname, '../public_html');
+  var datastore_options = {};
+  datastore_options.directory = config.store_directory;
 
   var app = express();
   app.use(express.static(public_html_directory));
@@ -41,6 +45,7 @@ function run(config, ldap_client, u2f, fn) {
   app.set('ldap client', ldap_client);
   app.set('totp engine', speakeasy);
   app.set('u2f', u2f);
+  app.set('user data store', new UserDataStore(DataStore, datastore_options));
   app.set('config', config);
   
   app.get  ('/login',   routes.login);
diff --git a/src/lib/user_data_store.js b/src/lib/user_data_store.js
new file mode 100644
index 00000000..5c7b363f
--- /dev/null
+++ b/src/lib/user_data_store.js
@@ -0,0 +1,39 @@
+
+module.exports = UserDataStore;
+
+var Promise = require('bluebird');
+var path = require('path');
+
+function UserDataStore(DataStore, options) {
+  var datastore_options = {};
+  if(options.directory) 
+    datastore_options.filename = path.resolve(options.directory, 'u2f_meta');
+
+  datastore_options.inMemoryOnly = options.inMemoryOnly || false;
+  datastore_options.autoload = true;
+  console.log(datastore_options);
+
+  this._u2f_meta_collection = Promise.promisifyAll(new DataStore(datastore_options));
+}
+
+UserDataStore.prototype.set_u2f_meta = function(userid, app_id, meta) {
+  var newDocument = {};
+  newDocument.userid = userid;
+  newDocument.appid = app_id;
+  newDocument.meta = meta;
+
+  var filter = {};
+  filter.userid = userid;
+  filter.appid = app_id;
+
+  return this._u2f_meta_collection.updateAsync(filter, newDocument, { upsert: true });
+}
+
+UserDataStore.prototype.get_u2f_meta = function(userid, app_id) {
+  var filter = {};
+  filter.userid = userid;
+  filter.appid = app_id;
+
+  return this._u2f_meta_collection.findOneAsync(filter);
+}
+
diff --git a/test/unitary/routes/test_u2f.js b/test/unitary/routes/test_u2f.js
index 09b01ee1..1c26c1cb 100644
--- a/test/unitary/routes/test_u2f.js
+++ b/test/unitary/routes/test_u2f.js
@@ -7,6 +7,7 @@ var winston = require('winston');
 
 describe('test u2f routes', function() {
   var req, res;
+  var user_data_store;
 
   beforeEach(function() {
     req = {}
@@ -21,8 +22,17 @@ describe('test u2f routes', function() {
     req.headers = {};
     req.headers.host = 'localhost';
 
+    var options = {};
+    options.inMemoryOnly = true;
+
+    user_data_store = {};
+    user_data_store.set_u2f_meta = sinon.stub().returns(Promise.resolve({}));
+    user_data_store.get_u2f_meta = sinon.stub().returns(Promise.resolve({}));
+    req.app.get.withArgs('user data store').returns(user_data_store);
+
     res = {};
     res.send = sinon.spy();
+    res.json = sinon.spy();
     res.status = sinon.spy();
   })
 
@@ -31,8 +41,6 @@ describe('test u2f routes', function() {
   describe('test signing request', test_signing_request);
   describe('test signing', test_signing);
 
-
-
   function test_registration_request() {
     it('should send back the registration request and save it in the session', function(done) {
       var expectedRequest = {
@@ -49,7 +57,7 @@ describe('test u2f routes', function() {
       u2f_mock.startRegistration.returns(Promise.resolve(expectedRequest));
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register_request(req, res);
+      u2f.register_request(req, res);
     });
 
     it('should return internal error on registration request', function(done) {
@@ -63,21 +71,19 @@ describe('test u2f routes', function() {
       u2f_mock.startRegistration.returns(Promise.reject('Internal error'));
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register_request(req, res);
+      u2f.register_request(req, res);
     });
   }
 
   function test_registration() {
-    it('should return status code 200', function(done) {
-      var user_key_container = {};
+    it('should save u2f meta and return status code 200', function(done) {
       var expectedStatus = {
         keyHandle: 'keyHandle',
         publicKey: 'pbk',
         certificate: 'cert'
       };
       res.send = sinon.spy(function(data) {
-        assert('user' in user_key_container);
-        assert.deepEqual(expectedStatus, user_key_container['user']);
+        assert('user', user_data_store.set_u2f_meta.getCall(0).args[0])
         done();
       });
       var u2f_mock = {};
@@ -86,7 +92,7 @@ describe('test u2f routes', function() {
 
       req.session.auth_session.register_request = {};
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register(req, res);
+      u2f.register(req, res);
     });
 
     it('should return unauthorized error on registration request', function(done) {
@@ -100,7 +106,7 @@ describe('test u2f routes', function() {
       u2f_mock.finishRegistration.returns(Promise.reject('Internal error'));
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register(req, res);
+      u2f.register(req, res);
     });
 
     it('should return unauthorized error when no auth request has been initiated', function(done) {
@@ -114,7 +120,7 @@ describe('test u2f routes', function() {
       u2f_mock.finishRegistration.returns(Promise.resolve());
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register(req, res);
+      u2f.register(req, res);
     });
   }
   
@@ -136,7 +142,7 @@ describe('test u2f routes', function() {
       u2f_mock.startAuthentication.returns(Promise.resolve(expectedRequest));
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).sign_request(req, res);
+      u2f.sign_request(req, res);
     });
 
     it('should return unauthorized error on registration request error', function(done) {
@@ -151,7 +157,7 @@ describe('test u2f routes', function() {
       u2f_mock.startAuthentication.returns(Promise.reject('Internal error'));
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).sign_request(req, res);
+      u2f.sign_request(req, res);
     });
 
     it('should send unauthorized error when no registration exists', function(done) {
@@ -167,8 +173,13 @@ describe('test u2f routes', function() {
       u2f_mock.startAuthentication = sinon.stub();
       u2f_mock.startAuthentication.returns(Promise.resolve(expectedRequest));
 
+      user_data_store.get_u2f_meta = sinon.stub().returns(Promise.resolve());
+
+      req.app.get = sinon.stub();
+      req.app.get.withArgs('logger').returns(winston);
+      req.app.get.withArgs('user data store').returns(user_data_store);
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).sign_request(req, res);
+      u2f.sign_request(req, res);
     });
   }
 
@@ -192,7 +203,7 @@ describe('test u2f routes', function() {
 
       req.session.auth_session.sign_request = {};
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).sign(req, res);
+      u2f.sign(req, res);
     });
 
     it('should return unauthorized error on registration request internal error', function(done) {
@@ -209,7 +220,7 @@ describe('test u2f routes', function() {
 
       req.session.auth_session.sign_request = {};
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register(req, res);
+      u2f.register(req, res);
     });
 
     it('should return unauthorized error when no sign request has been initiated', function(done) {
@@ -223,7 +234,7 @@ describe('test u2f routes', function() {
       u2f_mock.finishAuthentication.returns(Promise.resolve());
 
       req.app.get.withArgs('u2f').returns(u2f_mock);
-      u2f(user_key_container).register(req, res);
+      u2f.register(req, res);
     });
   }
 });
diff --git a/test/unitary/test_data_persistence.js b/test/unitary/test_data_persistence.js
new file mode 100644
index 00000000..774d28fd
--- /dev/null
+++ b/test/unitary/test_data_persistence.js
@@ -0,0 +1,169 @@
+
+var server = require('../../src/lib/server');
+
+var request = require('request');
+var assert = require('assert');
+var speakeasy = require('speakeasy');
+var sinon = require('sinon');
+var Promise = require('bluebird');
+var tmp = require('tmp');
+
+var request = Promise.promisifyAll(request);
+
+var PORT = 8050;
+var BASE_URL = 'http://localhost:' + PORT;
+
+describe('test data persistence', function() {
+  var u2f;
+  var tmpDir;
+  var ldap_client = {
+    bind: sinon.stub()
+  };
+  var config;
+
+  before(function() {
+    u2f = {};
+    u2f.startRegistration = sinon.stub();
+    u2f.finishRegistration = sinon.stub();
+    u2f.startAuthentication = sinon.stub();
+    u2f.finishAuthentication = sinon.stub();
+
+    ldap_client.bind.withArgs('cn=test_ok,ou=users,dc=example,dc=com', 
+                              'password').yields(undefined);
+    ldap_client.bind.withArgs('cn=test_nok,ou=users,dc=example,dc=com', 
+                              'password').yields('error');
+    tmpDir = tmp.dirSync({ unsafeCleanup: true });
+    config = {
+      port: PORT,
+      totp_secret: 'totp_secret',
+      ldap_url: 'ldap://127.0.0.1:389',
+      ldap_users_dn: 'ou=users,dc=example,dc=com',
+      session_secret: 'session_secret',
+      session_max_age: 50000,
+      store_directory: tmpDir.name
+    };
+  });
+
+  after(function() {
+    tmpDir.removeCallback();
+  });
+
+  it('should save a u2f meta and reload it after a restart of the server', function() {
+    var server;
+    var sign_request = {};
+    var sign_status = {};
+    var registration_request = {};
+    var registration_status = {};
+    u2f.startRegistration.returns(Promise.resolve(sign_request));
+    u2f.finishRegistration.returns(Promise.resolve(sign_status));
+    u2f.startAuthentication.returns(Promise.resolve(registration_request));
+    u2f.finishAuthentication.returns(Promise.resolve(registration_status));
+  
+    var j1 = request.jar();
+    var j2 = request.jar();
+    return start_server(config, ldap_client, u2f)
+    .then(function(s) {
+      server = s;
+      return execute_login(j1);
+    })
+    .then(function(res) {
+      return execute_first_factor(j1);
+    }) 
+    .then(function() {
+      return execute_u2f_registration(j1);
+    })
+    .then(function() {
+      return execute_u2f_authentication(j1);
+    })
+    .then(function() {
+      return stop_server(server);
+    })
+    .then(function() {
+      return start_server(config, ldap_client, u2f)
+    })
+    .then(function(s) {
+      server = s;
+      return execute_login(j2);
+    })
+    .then(function() {
+      return execute_first_factor(j2);
+    }) 
+    .then(function() {
+      return execute_u2f_authentication(j2);
+    })
+    .then(function(res) {
+      assert.equal(204, res.statusCode);
+      server.close();
+      return Promise.resolve();
+    })
+    .catch(function(err) {
+      console.error(err);
+      return Promise.reject(err);
+    });
+  });
+
+  function start_server(config, ldap_client, u2f) {
+    return new Promise(function(resolve, reject) {
+      var s = server.run(config, ldap_client, u2f);
+      resolve(s);
+    });
+  }
+
+  function stop_server(s) {
+    return new Promise(function(resolve, reject) {
+      s.close();
+      resolve();
+    });
+  }
+
+  function execute_first_factor(jar) {
+    return request.postAsync({ 
+      url: BASE_URL + '/_auth/1stfactor',
+      jar: jar,
+      form: {
+        username: 'test_ok',
+        password: 'password'
+      }
+    });
+  }
+
+  function execute_u2f_registration(jar) {
+    return request.getAsync({
+      url: BASE_URL + '/_auth/2ndfactor/u2f/register_request',
+      jar: jar
+    })
+    .then(function(res) {
+      return request.postAsync({
+        url: BASE_URL + '/_auth/2ndfactor/u2f/register',
+        jar: jar,
+        form: {
+          s: 'test'
+        }
+      });
+    });
+  }
+
+  function execute_u2f_authentication(jar) {
+    return request.getAsync({
+      url: BASE_URL + '/_auth/2ndfactor/u2f/sign_request',
+      jar: jar
+    })
+    .then(function() {
+      return request.postAsync({
+        url: BASE_URL + '/_auth/2ndfactor/u2f/sign',
+        jar: jar,
+        form: {
+          s: 'test'
+        }
+      });
+    });
+  }
+
+  function execute_verification(jar) {
+    return request.getAsync({ url: BASE_URL + '/_verify', jar: jar })
+  }
+
+  function execute_login(jar) {
+    return request.getAsync({ url: BASE_URL + '/login', jar: jar })
+  }
+});
diff --git a/test/unitary/test_user_data_store.js b/test/unitary/test_user_data_store.js
new file mode 100644
index 00000000..f46b9941
--- /dev/null
+++ b/test/unitary/test_user_data_store.js
@@ -0,0 +1,68 @@
+
+var UserDataStore = require('../../src/lib/user_data_store');
+var DataStore = require('nedb');
+var assert = require('assert');
+var Promise = require('bluebird');
+
+describe('test user data store', function() {
+  it('should save a u2f meta', function() {
+    var options = {};
+    options.inMemoryOnly = true;
+
+    var data_store = new UserDataStore(DataStore, options);
+
+    var userid = 'user';
+    var app_id = 'https://localhost';
+    var meta = {};
+    meta.publicKey = 'pbk';
+
+    return data_store.set_u2f_meta(userid, app_id, meta)
+    .then(function(numUpdated) {
+      assert.equal(1, numUpdated);
+      return Promise.resolve();
+    });
+  });
+
+  it('should retrieve no u2f meta', function() {
+    var options = {};
+    options.inMemoryOnly = true;
+
+    var data_store = new UserDataStore(DataStore, options);
+
+    var userid = 'user';
+    var app_id = 'https://localhost';
+    var meta = {};
+    meta.publicKey = 'pbk';
+
+    return data_store.get_u2f_meta(userid, app_id)
+    .then(function(doc) {
+      assert.equal(undefined, doc);
+      return Promise.resolve();
+    });
+  });
+
+  it('should insert and retrieve a u2f meta', function() {
+    var options = {};
+    options.inMemoryOnly = true;
+
+    var data_store = new UserDataStore(DataStore, options);
+
+    var userid = 'user';
+    var app_id = 'https://localhost';
+    var meta = {};
+    meta.publicKey = 'pbk';
+
+    return data_store.set_u2f_meta(userid, app_id, meta)
+    .then(function(numUpdated, data) {
+      assert.equal(1, numUpdated);
+      return data_store.get_u2f_meta(userid, app_id)
+    })
+    .then(function(doc) {
+      assert.deepEqual(meta, doc.meta);
+      assert.deepEqual(userid, doc.userid);
+      assert.deepEqual(app_id, doc.appid);
+      assert('_id' in doc);
+      return Promise.resolve();
+    });
+  });
+});