diff --git a/PasswordUtil.h b/PasswordUtil.h
new file mode 100644
index 0000000..2cefde0
--- /dev/null
+++ b/PasswordUtil.h
@@ -0,0 +1,53 @@
+/*
+ * PasswordUtil.h
+ *
+ *  Created on: Dec 18, 2021
+ *      Author: Goppier
+ */
+
+#ifndef PASSWORDUTIL_H_
+#define PASSWORDUTIL_H_
+
+#include <stdint.h>
+
+#define BYTE_TO_BINARY(byte)  \
+  (byte & 0x80 ? '1' : '0'), \
+  (byte & 0x40 ? '1' : '0'), \
+  (byte & 0x20 ? '1' : '0'), \
+  (byte & 0x10 ? '1' : '0'), \
+  (byte & 0x08 ? '1' : '0'), \
+  (byte & 0x04 ? '1' : '0'), \
+  (byte & 0x02 ? '1' : '0'), \
+  (byte & 0x01 ? '1' : '0') 
+
+
+struct wallpaper_params_t
+{
+	uint8_t pattern;
+	uint8_t icon;
+	uint32_t background_colour;
+	uint32_t foreground_colour;
+	uint16_t trainer_id;
+    uint8_t key;
+};
+
+enum english_letter_t
+{
+	B = 0,
+	C, D, F, G, H, J, K, L, M,
+	N, P, Q, R, S, T, V, W, Z,
+	b, c, d, f, g, h, j, k, m,
+	n, p, q, s
+};
+
+void prepareArray(uint8_t *array_code, wallpaper_params_t wallpaper);
+void bitShiftRight(uint8_t *array_code, uint8_t range, uint8_t bits_to_shift);
+void maskArray(uint8_t *array_code, uint8_t key);
+void createEnglishCode(uint8_t *array_code, english_letter_t *english_code_buffer);
+
+void printBinaryEnglishCode(uint8_t *array_code, english_letter_t *english_code);
+void printSecretEnglishCode(english_letter_t *password);
+
+
+
+#endif /* PASSWORDUTIL_H_ */