diff --git a/des/sim/verilog/data_output.txt b/des/sim/verilog/data_output.txt
new file mode 100644
index 0000000..7672096
--- /dev/null
+++ b/des/sim/verilog/data_output.txt
@@ -0,0 +1,128 @@
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\ No newline at end of file
diff --git a/des/sim/verilog/key_input.txt b/des/sim/verilog/key_input.txt
new file mode 100644
index 0000000..ff421da
--- /dev/null
+++ b/des/sim/verilog/key_input.txt
@@ -0,0 +1,128 @@
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\ No newline at end of file