diff --git a/trunk/hsm_utils/sign_verify_rsa_pkcs1_sha256.c b/trunk/hsm_utils/sign_verify_rsa_pkcs1_sha256.c
index f4f0e95..6379e91 100644
--- a/trunk/hsm_utils/sign_verify_rsa_pkcs1_sha256.c
+++ b/trunk/hsm_utils/sign_verify_rsa_pkcs1_sha256.c
@@ -69,6 +69,7 @@ int loadFileSize = 0;
 int validFileSize = 0;
 int offsetFileSize = 0;
 unsigned char *loadFileBuf = NULL;
+char *writeFilePath = NULL;
 
 // function
 int signVerifyRSAPKCS1Sha256( NFKM_KeyIdent priv_ident, NFKM_KeyIdent pub_ident );
@@ -234,6 +235,31 @@ int signVerifyRSAPKCS1Sha256( NFKM_KeyIdent priv_ident, NFKM_KeyIdent pub_ident
         // show data
 		PrintArray( (char*)"HSM Sign", middlePtr, middleLen );
 
+        // save sign data
+        if (writeFilePath)
+        {
+            FILE *pSaveFile;
+
+            pSaveFile = fopen( writeFilePath, "wb" );
+            if (pSaveFile == NULL)
+            {
+                printf("file open error : %s\n", writeFilePath);
+                return 1;
+            }
+            else
+            {
+                if (fwrite( middlePtr, middleLen, 1, pSaveFile ) != 1)
+                {
+                    printf("file write error : %s\n", writeFilePath);
+                }
+                else
+                {
+            		printf( "Success : Sign Data written to %s\n", writeFilePath );
+                }
+            }
+            fclose( pSaveFile );
+        }
+
 		NFastApp_Free_Command( handle, NULL, NULL, &cmd );
 		NFastApp_Free_Reply( handle, NULL, NULL, &reply );
 
@@ -435,6 +461,7 @@ int main( int argc, char *argv[] )
             { "priv",       required_argument,  0,  0 },
             { "pub",        required_argument,  0,  0 },
             { "in",         required_argument,  0,  0 },
+            { "out",        required_argument,  0,  0 },
             { "size",       required_argument,  0,  0 },
             { "offset",     required_argument,  0,  0 },
             { 0,            0,                  0,  0 }
@@ -468,11 +495,15 @@ int main( int argc, char *argv[] )
                     {
                         loadFilePath = optarg;
                     } break;
-                case 4 : // size
+                case 4 : // out
+                    {
+                        writeFilePath = optarg;
+                    } break;
+                case 5 : // size
                     {
                         validFileSize = atoi(optarg);
                     } break;
-                case 5 : // offset
+                case 6 : // offset
                     {
                         offsetFileSize = atoi(optarg);
                     } break;
@@ -488,6 +519,8 @@ int main( int argc, char *argv[] )
     printf( "  Default=%s\n", DEFAULT_PUB_KEY_FILE_PATH );
     printf( " --in filename   : input file for SHA256\n" );
     printf( "  Default=reasonable array\n" );
+    printf( " --out filename  : output sign data\n" );
+    printf( "  Default=N/A\n" );
     printf( " --size size     : valid file size for SHA256\n" );
     printf( " --offset fize   : offset file size for SHA256\n" );
     printf( "\n" );
@@ -535,7 +568,7 @@ int main( int argc, char *argv[] )
 		return 1;
 	}
 		
-    // create rsa-pss cert
+    // create rsa pkcs1 sha256 sign & verify
     result = signVerifyRSAPKCS1Sha256( priv_keyident, pub_keyident );
 	if ( result != Status_OK )
 	{