diff --git a/src/Des.java b/src/Des.java
new file mode 100644
index 0000000..d39e962
--- /dev/null
+++ b/src/Des.java
@@ -0,0 +1,50 @@
+/*
+ * Des.java, 13/09/2022
+ * INU Champollion 2022-2023, L3 INFO
+ * pas de copyright, aucun droits
+ */
+
+/**
+ * @author Lucàs VABRE
+ */
+public class Des {
+
+    final private static int TAILLE_BLOC = 64;
+    final private static int TAILLE_SOUS_BLOC = 32;
+    final private static int NB_RONDE = 1;
+    final private static int[] TAB_DECALAGE = {
+            1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1
+    };
+
+    final private static int[] PERM_INITIALE = {
+            58, 50, 42, 34, 26, 18, 10, 2,
+            60, 52, 44, 36, 28, 20, 12, 4,
+            62, 54, 46, 38, 30, 22, 14, 6,
+            64, 56, 48, 40, 32, 24, 16, 8,
+            57, 49, 41, 33, 25, 17,  9, 1,
+            59, 51, 43, 35, 27, 19, 11, 3,
+            61, 53, 45, 37, 29, 21, 13, 5,
+            63, 55, 47, 39, 31, 23, 15, 7
+    };
+
+    final private static int[][] S = {
+            {14,  4, 13, 1,  2, 15, 11, 8, 3, 10, 6, 12, 5, 9, 0, 7},
+            { 0, 15,  7, 4, 14,  2, 13, 1, 10, 6, 12, 11, 9, 5, 3, 8, 2, 4, 1, 14, 8, 13, 6, 2, 11, 15, 12, 9, 7, 3, 10, 50, 3, 15, 12, 8, 2, 4, 9, 175, 11, 3, 14, 10, 0, 6,133
+    };
+    final private static int[] E = {
+            32,  1,  2,  3,  4,  5,
+             4,  5,  6,  7,  8,  9,
+             8,  9, 10, 11, 12, 13,
+            12, 13, 14, 15, 16, 17,
+            16, 17, 21, 18, 19, 20,
+            21, 20, 22, 23, 24, 25,
+            24, 25, 26, 27, 28, 29,
+            28, 29, 30, 31, 32, 1
+    };
+
+
+    private int[] masterKey;
+    private int[] tabCles;
+
+
+}