diff --git a/Makefile.am b/Makefile.am
index 8dc41b2..66f899a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,11 +7,13 @@ mconnect_SOURCES = src/main.vala \
 		   src/discovery.vala \
 		   src/packet.vala \
 		   src/device.vala \
-		   src/devicemanager.vala
+		   src/core.vala \
+		   src/mconn-crypt.c \
+		   src/mconn-crypt.h
 
 mconnect_LDADD = $(MCONNECT_LIBS)
 
-mconnect_CFLAGS = $(MCONNECT_CFLAGS)
+mconnect_CFLAGS = $(MCONNECT_CFLAGS) -Isrc
 
 test_mconn_crypt_SOURCES = test/mconn-crypt-test.c \
 			   src/mconn-crypt.c \
diff --git a/src/core.vala b/src/core.vala
new file mode 100644
index 0000000..90f6a60
--- /dev/null
+++ b/src/core.vala
@@ -0,0 +1,45 @@
+/* ex:ts=4:sw=4:sts=4:et */
+/* -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * AUTHORS
+ * Maciek Borzecki <maciek.borzecki (at] gmail.com>
+ */
+using MConn;
+
+class Core : Object {
+
+	public Crypt crypt { get; private set; default = null; }
+
+	private static Core _instance = null;
+
+	private Core(Crypt crypt) {
+		debug("init core");
+		this.crypt = crypt;
+	}
+
+	public static Core? instance() {
+		if (Core._instance == null)
+		{
+			var crypt = new Crypt.for_key_path("private.pem");
+
+			var core = new Core(crypt);
+			Core._instance = core;
+		}
+
+		return Core._instance;
+	}
+
+}
\ No newline at end of file