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+Scyther
+
+The Scyther Tool: Automatic Verification of Security Protocols
+
+
+- Linux/Windows
+
+  Requirements:
+  	
+	python				www.python.org
+	wxPython			www.wxpython.org
+	(c)elementtree 	elementtree
+	effbot.org/zone/element-index.htm (slower but more widely available)
+			celementtree 	effbot.org/zone/celementtree.htm (preferred)
+	graphviz			www.graphviz.org
+
+  Optional:
+
+  	Python Imaging Library		www.pythonware.com/products/pil/
+
+	(It might be possible to include PIL in the sources)
+