“…disaster recovery, security standards, logs and audit trails), reliability, legal and regulatory concerns when providing cloud services. There are also issues related to the lack of standards for ensuring interoperability or migration between cloud providers and not at last, inquiries around the provider's capacity in an very young industry, in terms of quality, company size, technology, communication [4,17,23,29] Related to the deployment of the cloud, NIST identifies four models: private cloud, community cloud, public cloud and hybrid cloud [22].…”