diff --git a/htdocs/blockedlog/admin/fingerprints.php b/htdocs/blockedlog/admin/fingerprints.php
index bdd569d31bc..29cd2a3f73b 100644
--- a/htdocs/blockedlog/admin/fingerprints.php
+++ b/htdocs/blockedlog/admin/fingerprints.php
@@ -24,6 +24,7 @@
 require '../../main.inc.php';
 require_once DOL_DOCUMENT_ROOT.'/blockedlog/lib/blockedlog.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/blockedlog/class/blockedlog.class.php';
+require_once DOL_DOCUMENT_ROOT.'/blockedlog/class/authority.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
 
 $langs->load("admin");
@@ -34,6 +35,21 @@ if (! $user->admin) accessforbidden();
   
 $action = GETPOST('action','alpha');
 
+if($action === 'downloadblockchain') {
+	
+	$auth = new BlockedLogAuthority($db);
+	
+	$bc = $auth->getLocalBlockChain();
+	
+	header('Content-Type: application/octet-stream');
+	header("Content-Transfer-Encoding: Binary");
+	header("Content-disposition: attachment; filename=\"" .$auth->signature. ".certif\""); 
+	
+	echo $bc;
+	
+	exit;
+}
+
 
 /*
  *	View
@@ -58,7 +74,7 @@ print $langs->trans("FingerprintsDesc")."<br>\n";
 
 print '<br>';
 
-echo '<div align="right"><a href="?all=1">'.$langs->trans('ShowAllFingerPrintsMightBeTooLong').'</a></div>';
+echo '<div align="right"><a href="?all=1">'.$langs->trans('ShowAllFingerPrintsMightBeTooLong').'</a> <a href="?action=downloadblockchain">'.$langs->trans('DownloadBlockChain').'</a></div>';
 		
 
 print '<table class="noborder" width="100%">';
diff --git a/htdocs/blockedlog/class/authority.class.php b/htdocs/blockedlog/class/authority.class.php
index 8d241694b70..b422fb130d7 100644
--- a/htdocs/blockedlog/class/authority.class.php
+++ b/htdocs/blockedlog/class/authority.class.php
@@ -18,7 +18,7 @@
 /**
  *	Class to manage certif authority
  */
-class BlockedLogAuthority 
+class BlockedLogAuthority
 {
 	
 	/**
@@ -56,6 +56,29 @@ class BlockedLogAuthority
     	
 	}
 	
+	/**
+	 *	Get the blockchain 
+	 *
+	 *	@return     string         			blockchain
+	 */
+	public function getLocalBlockChain() {
+		
+		$block_static = new BlockedLog($this->db);
+		
+		$this->signature = $block_static->getSignature();
+		
+		$blocks = $block_static->getLog('all', 0, 0, 1) ;
+		
+		$this->blockchain = '';
+		
+		foreach($blocks as &$b) {
+			$this->blockchain.=$b->signature;
+			
+		}
+		
+		return $this->blockchain;
+	}
+	
 	/**
 	 *	Get hash of the block chain to check
 	 *
diff --git a/htdocs/blockedlog/class/blockedlog.class.php b/htdocs/blockedlog/class/blockedlog.class.php
index 26283d6b08a..1f93eb3cc26 100644
--- a/htdocs/blockedlog/class/blockedlog.class.php
+++ b/htdocs/blockedlog/class/blockedlog.class.php
@@ -19,7 +19,7 @@
  *	Class to manage Blocked Log
  */
 
-class BlockedLog 
+class BlockedLog
 {
 	
 	/**
diff --git a/htdocs/install/mysql/migration/5.0.0-6.0.0.sql b/htdocs/install/mysql/migration/5.0.0-6.0.0.sql
index f4757e2475f..0f9ef8ee3ca 100644
--- a/htdocs/install/mysql/migration/5.0.0-6.0.0.sql
+++ b/htdocs/install/mysql/migration/5.0.0-6.0.0.sql
@@ -409,7 +409,7 @@ CREATE TABLE llx_blockedlog
 	date_object	datetime,
 	object_data	text,
 	fk_user	integer,
-	entity integer, 
+	entity integer DEFAULT 1, 
 	certified integer
 ) ENGINE=innodb;
 
diff --git a/htdocs/install/mysql/tables/llx_blockedlog.sql b/htdocs/install/mysql/tables/llx_blockedlog.sql
index 769eb34e092..afc0f0d4375 100644
--- a/htdocs/install/mysql/tables/llx_blockedlog.sql
+++ b/htdocs/install/mysql/tables/llx_blockedlog.sql
@@ -13,7 +13,7 @@ CREATE TABLE llx_blockedlog
 	date_object	datetime,
 	object_data	text,
 	fk_user	integer,
-	entity integer, 
+	entity integer DEFAULT 1, 
 	certified integer
 ) ENGINE=innodb;