diff --git a/des/syn/vhdl/Makefile b/des/syn/vhdl/Makefile
new file mode 100644
index 0000000..beb23d9
--- /dev/null
+++ b/des/syn/vhdl/Makefile
@@ -0,0 +1,45 @@
+# ======================================================================
+# DES encryption/decryption
+# algorithm according to FIPS 46-3 specification
+# Copyright (C) 2020 Torsten Meissner
+#-----------------------------------------------------------------------
+# This program 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 2 of the License, or
+# (at your option) any later version.
+
+# 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 St, Fifth Floor, Boston, MA  02110-1301  USA
+# ======================================================================
+
+
+SRC_FILES := ../../rtl/vhdl/des_pkg.vhd ../../rtl/vhdl/des.vhd
+VHD_STD   := 08
+
+
+.PHONY: all
+all: des_synth.vhd syn
+
+.PHONY: syn
+syn: des.json
+
+
+des.o: $(SRC_FILES)
+	ghdl -a --std=$(VHD_STD) $(SRC_FILES)
+
+des_synth.vhd: $(SRC_FILES)
+	ghdl --synth --std=$(VHD_STD) $(SRC_FILES) -e des > $@
+
+des.json: des.o
+	yosys -m ghdl -p 'ghdl --std=08 --no-formal des; synth_ice40 -json $@'
+
+
+clean :
+	echo "# Cleaning files"
+	rm -f *.o work*.cf des.json des_synth.vhd
diff --git a/tdes/syn/vhdl/Makefile b/tdes/syn/vhdl/Makefile
new file mode 100644
index 0000000..2dfc68b
--- /dev/null
+++ b/tdes/syn/vhdl/Makefile
@@ -0,0 +1,47 @@
+# ======================================================================
+# TDES encryption/decryption
+# algorithm according to FIPS 46-3 specification
+# Copyright (C) 2020 Torsten Meissner
+#-----------------------------------------------------------------------
+# This program 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 2 of the License, or
+# (at your option) any later version.
+
+# 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 St, Fifth Floor, Boston, MA  02110-1301  USA
+# ======================================================================
+
+
+DES_SRC_FILES  := ../../../des/rtl/vhdl/des_pkg.vhd ../../../des/rtl/vhdl/des.vhd
+TDES_SRC_FILES := ../../rtl/vhdl/tdes.vhd
+SRC_FILES      := $(DES_SRC_FILES) $(TDES_SRC_FILES)
+VHD_STD        := 08
+
+
+.PHONY: all
+all : tdes_synth.vhd syn
+
+.PHONY: syn
+syn: tdes.json
+
+
+tdes.o: $(SRC_FILES)
+	ghdl -a --std=$(VHD_STD) $(SRC_FILES)
+
+tdes_synth.vhd: $(SRC_FILES)
+	ghdl --synth --std=$(VHD_STD) $(SRC_FILES) -e tdes > $@
+
+tdes.json: tdes.o
+	yosys -m ghdl -p 'ghdl --std=08 --no-formal tdes; synth_ice40 -json $@'
+
+
+clean :
+	echo "# Cleaning files"
+	rm -f *.o work*.cf tdes.json tdes_synth.vhd