Various Encryption Algorithms to Enhance Data Security in Cloud Storage

Cloud computing is the fastest growing technology nowadays; it is the technology for the next generation. This technology has changed the face of traditional computing technologies. This technology offers many benefits to the field of IT enterprises, even though it has to overcome many challenges to satisfy its maturity level. It provides services to an organization over a network with the ability to scale up or down their service requirements. Cloud computing services are established and provided by third parties, who have the infrastructure. Instead of buying IT equipment (hardware and/or software) and managing it themselves, many organizations today prefer to buy services from IT service providers. The number of service providers increase dramatically and the cloud is becoming the tools of choice for more cloud storage services. This model is attractive mainly for business oriented people because it reduces total cost of operation, maintenance cost, increases return of investment. Cloud computing is basically virtual pool of resources and it provides these resources to users via internet. It offers a range of services for end users; among which there's Storage as a service. In recent years, Storage in Cloud gained popularity among both companies and private users. However, data privacy, security, reliability and interoperability issues still have to be adequately solved. But the most important problem is security and how cloud provider assures it. The growth of the cloud users has unfortunately been accompanied with a growth in malicious activity in the cloud. More and more vulnerabilities are discovered, and nearly every day, new security advisories are published. Millions of users are surfing the Cloud for various purposes, therefore they need highly safe and persistent services. The future of cloud, especially in expanding the range of applications, involves a much deeper degree of privacy, and authentication. To secure the Cloud means secure the treatments (calculations) and storage (databases hosted by the Cloud provider).The objective of cloud security is to protect data as well as cloud systems from unauthorized access, use, disclosure, disruption, modification, or destruction. To protect the data in cloud database server cryptography is one of the important methods. Cryptography provides various symmetric and asymmetric algorithms to secure the data. This paper discusses the various benefits and major security challenges of cloud computing, it also highlights the various cryptographic encryption algorithms as the major solution of security challenges.