diff --git a/PyNDN/Data.py b/PyNDN/Data.py
index 6d36dc9..48c54da 100644
--- a/PyNDN/Data.py
+++ b/PyNDN/Data.py
@@ -65,7 +65,8 @@
 
     def verify_signature (self, key):
         """There is no actual signing in ndnSIM for now, but we will check if signature matches the key"""
-        return self._data.GetSignature () == key.fakeKey
+        return True
+        # return self._data.GetSignature () == key.fakeKey
 
     def __getattr__ (self, name):
         if name == "_data":
diff --git a/PyNDN/Face.py b/PyNDN/Face.py
index 3a905fa..d63550f 100644
--- a/PyNDN/Face.py
+++ b/PyNDN/Face.py
@@ -24,8 +24,8 @@
 from Interest import Interest
 from Name import Name
 
-import time
 import functools
+import traceback
 
 deleteList = []
 
@@ -99,7 +99,10 @@
             raise TypeError ("Unsupported type to publish data [%s]" % type (data))
 
 def removeFromDeleteList (object):
-    deleteList.remove (object)
+    try:
+        deleteList.remove (object)
+    except:
+        pass
 
 class ExpressInterestConverter:
     def __init__ (self, onData, onTimeout):
@@ -108,18 +111,27 @@
 
     def handleOnData (self, interest, data):
         ns.core.Simulator.ScheduleNow (removeFromDeleteList, self)
-        if self.onData:
-            return self.onData (Interest (interest=interest), Data (data = data))
+        try:
+            if self.onData:
+                return self.onData (Interest (interest=interest), Data (data = data))
+        except Exception, e:
+            traceback.print_exc()
 
     def handleOnTimeout (self, interest):
         ns.core.Simulator.ScheduleNow (removeFromDeleteList, self)
-        if self.onTimeout:
-            self.onTimeout (Interest (interest=interest))
+        try:
+            if self.onTimeout:
+                self.onTimeout (Interest (interest=interest))
+        except Exception, e:
+            traceback.print_exc()
 
 class OnInterestConvert (object):
     def __init__ (self, onInterest):
         self.onInterest = onInterest
     def __call__ (self, name, interest):
         ns.core.Simulator.ScheduleNow (removeFromDeleteList, self)
-        if self.onInterest:
-            self.onInterest (Name (name = name), Interest (interest = interest))
+        try:
+            if self.onInterest:
+                self.onInterest (Name (name = name), Interest (interest = interest))
+        except Exception, e:
+            traceback.print_exc()
diff --git a/PyNDN/Name.py b/PyNDN/Name.py
index 60ac68d..b760213 100644
--- a/PyNDN/Name.py
+++ b/PyNDN/Name.py
@@ -25,7 +25,7 @@
     def __init__ (self, 
                   value = None,
                   name = None):
-        if name:
+        if name is not None:
             if isinstance (name, ns.ndnSIM.ndn.Name):
                 self._name = name
             elif isinstance (name, Name):
@@ -33,8 +33,15 @@
             else:
                 raise TypeError ("Incorrect type for 'name' parameter [%s]" % type (name))
         else:
-            if value:
-                self._name = ns.ndnSIM.ndn.Name (value)
+            if value is not None:
+                if isinstance (value, Name):
+                    self._name = ns.ndnSIM.ndn.Name (value._name)
+                elif isinstance (value, ns.ndnSIM.ndn.Name):
+                    self._name = ns.ndnSIM.ndn.Name (value)
+                elif isinstance (value, str):
+                    self._name = ns.ndnSIM.ndn.Name (value)
+                else:
+                    raise TypeError ("Not support tyupe [%s]" % type (value))
             else:
                 self._name = ns.ndnSIM.ndn.Name ()
 
@@ -80,3 +87,7 @@
 
     def isPrefixOf (self, other):
         return self[:] == other[:len(self)]
+
+    @property
+    def keyName (self):
+        return self
diff --git a/PyNDN/nre.py b/PyNDN/nre.py
index 669a712..6a41948 100644
--- a/PyNDN/nre.py
+++ b/PyNDN/nre.py
@@ -138,14 +138,14 @@
 
         matcher = re.compile(self.expr)
         if self.exact:
-            res = matcher.match(name[offset])
+            res = matcher.match(str(name[offset]))
             if res:
                 self._appendBackRef(res)
                 self.matchResult.append(name[offset])
                 _LOG.debug("Succeed " + self.__class__.__name__ + ".match() ")
                 return True
         else:
-            res = matcher.search(name[offset])
+            res = matcher.search(str(name[offset]))
             if res:
                 self._appendBackRef(res)
                 self.matchResult.append(name[offset])