diff --git a/src/sync_mixin.cc b/src/sync_mixin.cc
new file mode 100644
index 0000000..051d541
--- /dev/null
+++ b/src/sync_mixin.cc
@@ -0,0 +1,30 @@
+#include "sync_mixin.hh"
+#include <pEp/sync.h>
+#include <assert.h>
+
+namespace pEp {
+    namespace PythonAdapter {
+        void SyncMixIn::register_for_keysync()
+        {
+            PEP_STATUS status = register_sync_callbacks(session, (void *) this,
+                    messageToSend, showHandshake);
+            assert(status == PEP_STATUS_OK);
+        }
+
+        PEP_STATUS SyncMixIn::messageToSend(void *obj, const message *msg)
+        {
+            SyncMixIn *that = (SyncMixIn *) obj;
+
+            return PEP_STATUS_OK;
+        }
+
+        PEP_STATUS SyncMixIn::showHandshake(void *obj,
+                const pEp_identity *self, const pEp_identity *partner)
+        {
+            SyncMixIn *that = (SyncMixIn *) obj;
+
+            return PEP_STATUS_OK;
+        }
+    }
+}
+
diff --git a/src/sync_mixin.hh b/src/sync_mixin.hh
new file mode 100644
index 0000000..ae3b865
--- /dev/null
+++ b/src/sync_mixin.hh
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "pEpmodule.hh"
+
+namespace pEp {
+    namespace PythonAdapter {
+        class SyncMixIn {
+            public:
+                virtual ~SyncMixIn() { }
+                void register_for_keysync();
+
+            protected:
+                static PEP_STATUS messageToSend(void *obj, const message *msg);
+                static PEP_STATUS showHandshake(void *obj,
+                        const pEp_identity *self, const pEp_identity *partner);
+        };
+    }
+}
+