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diff --git a/utility/encryption/libtomcrypt.h b/utility/encryption/libtomcrypt.h
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+/* ----------------------------------------------------------------------------
+ *         ATMEL Microcontroller Software Support 
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2008, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !Purpose
+/// 
+/// Firmware encryption using libTomCrypt
+/// 
+/// !Usage
+/// 
+/// -# ltc_init: Initialize LibTomCrypt
+/// -# ltc_init_AES_CBC
+/// -# ltc_init_AES_CTR
+/// -# ltc_init_AES_ECB
+/// -# ltc_init_3DES_CBC
+/// -# ltc_init_3DES_CTR
+/// -# ltc_init_3DES_ECB
+/// -# ltc_cleanup
+/// -# ltc_cleanup_CBC
+/// -# ltc_cleanup_CTR
+/// -# ltc_cleanup_ECB
+/// -# ltc_decrypt
+/// -# ltc_decrypt_CBC
+/// -# ltc_decrypt_CTR
+/// -# ltc_decrypt_ECB
+//------------------------------------------------------------------------------
+
+#ifndef BOOTLOADER_LIBTOMCRYPT_H
+#define BOOTLOADER_LIBTOMCRYPT_H
+
+//------------------------------------------------------------------------------
+// Includes
+//------------------------------------------------------------------------------
+
+#include "config.h"
+
+#if defined(USE_ENCRYPTION) && (defined(ENCRYPTION_AES_LTC) || defined(ENCRYPTION_3DES_LTC))
+
+//------------------------------------------------------------------------------
+// Check configuration
+//------------------------------------------------------------------------------
+
+// Supported modes
+#if !defined(ENCRYPTION_CTR) && \
+    !defined(ENCRYPTION_CBC) && \
+    !defined(ENCRYPTION_ECB)
+  #error No other mode than ECB, CBC & CTR are supported.
+#endif
+
+// Supported key length
+#if defined(ENCRYPTION_AES_LTC)
+  #if (ENCRYPTION_KEY_LENGTH != 16) && \
+      (ENCRYPTION_KEY_LENGTH != 24) && \
+      (ENCRYPTION_KEY_LENGTH != 32) 
+    #error Only a key length of 128, 192 or 256 bits are supported with AES.
+  #endif
+#elif defined(ENCRYPTION_3DES_LTC)
+  #if (ENCRYPTION_KEY_LENGTH != 16) && \
+      (ENCRYPTION_KEY_LENGTH != 24)
+    #error Only a key length of 128 or 192 bits are supported with Triple-DES.
+  #endif
+#endif
+
+// Supported block length
+#if defined(ENCRYPTION_AES_LTC)
+  #if (ENCRYPTION_BLOCK_LENGTH != 16)
+    #error Only a block length of 128 bits is supported with AES.
+  #endif
+#elif defined(ENCRYPTION_3DES_LTC)
+  #if (ENCRYPTION_BLOCK_LENGTH != 8)
+    #error Only a block length of 64 bits is supported with Triple-DES.
+  #endif
+#endif
+
+//------------------------------------------------------------------------------
+// Definitions
+//------------------------------------------------------------------------------
+
+// Functions
+#ifdef ONLY_ONE_ENCRYPTION
+#define ENCRYPTION_INIT     ltc_init
+#define ENCRYPTION_CLEANUP  ltc_cleanup
+#define ENCRYPTION_DECRYPT  ltc_decrypt
+
+#if defined(ENCRYPTION_AES_LTC)
+  #define CIPHER_NAME       "rijndael"
+  #define CIPHER_DESC       rijndael_desc
+#elif defined(ENCRYPTION_3DES_LTC)
+  #define CIPHER_NAME       "3des"
+  #define CIPHER_DESC       des3_desc
+#endif
+#endif
+
+//------------------------------------------------------------------------------
+// Prototypes
+//------------------------------------------------------------------------------
+
+#ifdef ONLY_ONE_ENCRYPTION
+extern void ltc_init(void);
+#endif
+extern void ltc_init_AES_CBC(void);
+extern void ltc_init_AES_CTR(void);
+extern void ltc_init_AES_ECB(void);
+extern void ltc_init_3DES_CBC(void);
+extern void ltc_init_3DES_CTR(void);
+extern void ltc_init_3DES_ECB(void);
+
+extern void ltc_cleanup(void);
+extern void ltc_cleanup_CBC(void);
+extern void ltc_cleanup_CTR(void);
+extern void ltc_cleanup_ECB(void);
+
+extern int ltc_decrypt(const unsigned char * cipherText, unsigned char * plainText, unsigned int length);
+extern int ltc_decrypt_CBC(const unsigned char * cipherText, unsigned char * plainText, unsigned int length);
+extern int ltc_decrypt_CTR(const unsigned char * cipherText, unsigned char * plainText, unsigned int length);
+extern int ltc_decrypt_ECB(const unsigned char * cipherText, unsigned char * plainText, unsigned int length);
+
+#endif // defined(USE_ENCRYPTION) && (defined(ENCRYPTION_AES_LTC) || defined(ENCRYPTION_3DES_LTC))
+#endif // BOOTLOADER_AES_LIBTOMCRYPT_H
+
+