diff --git a/trunk/ConsoleDataMigration/common/SdReaderWriter.cpp b/trunk/ConsoleDataMigration/common/SdReaderWriter.cpp
index 583a46f..d5870cc 100644
--- a/trunk/ConsoleDataMigration/common/SdReaderWriter.cpp
+++ b/trunk/ConsoleDataMigration/common/SdReaderWriter.cpp
@@ -26,21 +26,6 @@
 namespace common
 {
 
-bool Compare(const bit8* p0, const bit8* p1, size_t size)
-{
-    s32 i;
-    bool result = true;
-    for (i = 0; i < size; ++i)
-    {
-        if (*(p0 + i) != *(p1 + i))
-        {
-            result = false;
-        }
-    }
-    return result;
-} // Compare
-
-
 nn::Result SdReaderWriter::Initialize()
 {
     nn::Result result;
@@ -228,7 +213,7 @@ nn::Result SdReaderWriter::ReadBufWithCmac(const wchar_t* path, void* buf, size_
     result = nn::crypto::CalculateAesCmacSw(cmac, sha256Hash, nn::crypto::Sha256Context::HASH_SIZE, common::cmacKey);
     COMMON_LOGGER_RESULT_IF_FAILED_WITH_LINE(result);
 
-    if(!Compare(reinterpret_cast<bit8*>(buf) + *totalSize, cmac, sizeof(cmac)))
+    if(std::memcmp(reinterpret_cast<bit8*>(buf) + *totalSize, cmac, sizeof(cmac)) != 0)
     {
         // 無効なファイル
         COMMON_LOGGER("Verification Failed\n");