diff --git a/build/tools/TamperDetectorForSrl/twl_format_rom_certificate.h b/build/tools/TamperDetectorForSrl/twl_format_rom_certificate.h
new file mode 100644
index 0000000..4c78515
--- /dev/null
+++ b/build/tools/TamperDetectorForSrl/twl_format_rom_certificate.h
@@ -0,0 +1,46 @@
+/*---------------------------------------------------------------------------*
+  Project:  TwlSDK - tools - makerom.TWL
+  File:     format_rom_certificate.h
+
+  Copyright 2007-2008 Nintendo.  All rights reserved.
+
+  These coded instructions, statements, and computer programs contain
+  proprietary information of Nintendo of America Inc. and/or Nintendo
+  Company Ltd., and are protected by Federal copyright law.  They may
+  not be disclosed to third parties or copied or duplicated in any form,
+  in whole or in part, without the prior written consent of Nintendo.
+
+  $Date::            $
+  $Rev$
+  $Author$
+ *---------------------------------------------------------------------------*/
+
+#ifndef	FORMAT_ROM_CERTIFICATE_H_
+#define	FORMAT_ROM_CERTIFICATE_H_
+
+/*===========================================================================*
+ *  ROM CERTIFICATE FORMAT
+ *===========================================================================*/
+
+#define TWL_ROM_CERT_MAGIC_NUMBER			0x54524543		// "CERT"‚Ì•¶Žš—ñ
+#define RSA_KEY_LENGTH						( 1024 / 8 )	// RSAŒöŠJŒ®’·
+#define ROM_CERT_SIGN_OFFSET				256				// ROMƒwƒbƒ_�Ø–¾�‘“à‚Ì��–¼ƒIƒtƒZƒbƒg
+#define ROM_HEADER_SIGN_TARGET_SIZE			0xe00			// ROMƒwƒbƒ_��–¼‘Î�ÛƒTƒCƒY
+
+// ROM�Ø–¾�‘ƒwƒbƒ_
+typedef struct RomCertificateHeader {
+	u32		magicNumber;
+	u32		version;
+	u32		serialNo;
+	u32		gameCode;
+}RomCertificateHeader;
+
+// ROM�Ø–¾�‘
+typedef struct RomCertificate {
+	RomCertificateHeader	header;
+	u8						reserved[ ROM_CERT_SIGN_OFFSET - sizeof(RomCertificateHeader) - RSA_KEY_LENGTH ];
+	u8						pubKeyMod[ RSA_KEY_LENGTH ];
+	u8						sign[ RSA_KEY_LENGTH ];
+}RomCertificate;
+
+#endif //FORMAT_ROM_CERTIFICATE_H_