diff --git a/src/main/java/org/gcube/common/storagehub/model/Constants.java b/src/main/java/org/gcube/common/storagehub/model/Constants.java
new file mode 100644
index 0000000..07c1155
--- /dev/null
+++ b/src/main/java/org/gcube/common/storagehub/model/Constants.java
@@ -0,0 +1,8 @@
+package org.gcube.common.storagehub.model;
+
+public class Constants {
+
+	public static final String enchriptedPrefix = "E_";
+	public static final String versionPrefix = "_v";
+	
+}