hile paperless is a source of tremendous opportunities for companies, it is also a bearing of many new risks. Indeed, externalization of electronic filing system can expose the company to several vulnerabilities and threats. We propose, in our gSafe (Government Safe) project a new Cloud service, named Safe Box as a service (SBaaS). SBaaS is used for probative value archiving sensitive documents during a defined period in a secure environment. We propose a layered model that intends to satisfy Cloud user requirements and Cloud security challenges. In this paper we define the technical architecture of the service and its basic components. In addition we discuss its feasibility using Hadoop Distributed File System.