Added new decryption block (be careful - untested component). Changed CMakeFiles to reflect more modular design (not finished for the lib directory)
diff --git a/grc/decryption/CMakeLists.txt b/grc/decryption/CMakeLists.txt
new file mode 100644
index 0000000..29d86f4
--- /dev/null
+++ b/grc/decryption/CMakeLists.txt
@@ -0,0 +1,22 @@
+# Copyright 2011 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+install(FILES
+    gsm_decryption.xml DESTINATION share/gnuradio/grc/blocks
+)
diff --git a/grc/decryption/gsm_decryption.xml b/grc/decryption/gsm_decryption.xml
new file mode 100644
index 0000000..28a2b93
--- /dev/null
+++ b/grc/decryption/gsm_decryption.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<block>
+  <name>Decryption</name>
+  <key>gsm_decryption</key>
+  <import>import grgsm</import>
+  <make>grgsm.decryption($k_c)</make>
+
+  <param>
+    <name>Kc session key</name>
+    <key>k_c</key>
+    <type>int_vector</type>
+  </param>
+
+  <sink>
+    <name>bursts</name>
+    <type>message</type>
+  </sink>
+  <source>
+    <name>bursts</name>
+    <type>message</type>
+  </source>
+  
+</block>