An Architecture for Data Security in Cloud Computing

Cloud computing is a more flexible, cost effective and proven delivery platform for providing business or consumer services over the Internet. Cloud computing supports distributed service oriented architecture, multi-user and multi-domain administrative infrastructure. So, it is more prone to security threats and vulnerabilities. At present, a major concern in cloud adoption is towards its security and privacy. Security and privacy issues are of great concern to cloud service providers who are actually hosting the services. In most cases, the provider must guarantee that their infrastructure is secure and clients´ data and applications are safe, by implementing security policies and mechanisms. The security issues are organized into several general categories: trust, identity management, software isolation, data protection, availability reliability, ownership, data backup, data portability and conversion, multi platform support and intellectual property. In this paper, it is discuss about some of the techniques that were implemented to protect data and propose architecture to protect data in cloud. This architecture was developed to store data in cloud in encrypted data format using cryptography technique which is based on block cipher.