Data Security and Cryptography in Cloud Environment

Abstract

Cloud is an intelligent computing delivery service. It provides unlimited service provisioning to users based on their demand. Services are processed by automated APIs(Application Programming Interface) without human interaction. Storage is one of the main services from the Cloud. Users could outsource their data to cloud. Cloud provides reliable storage. Data outsource to cloud are stored in different cloud datacenter located in different geographical location to maintain the reliable storage. Cloud has many challenges like scalability, resource allocation, virtualization, security, trust, service level agreement and etc. Among these challenges, security is the top level concern in cloud storage. Cloud storage has many security related issues. Traditionally, Security is addressed by cryptography techniques. This paper describes the data security challenges, importance of security and security mechanism for cloud storage. Different security mechanisms are addressed in this paper, among them confidentiality, integrity and authentication are important for data security in cloud. An efficient cryptography technique might protect the cloud environment from unauthorized usage. Keywords