A Comparison of ECC and Improved ECC Algorithm for Cloud Security

Cloud computing is a distributed environment that encompasses thousands of computers that work in parallel to perform a task in lesser time than the traditional computing models. This parallelism enables the low cost virtualization of hardware resources with increased computational performances. Cloud computing provides tremendous opportunity for small and medium scale enterprises to grow their business using IT services with zero deployment cost. Whenever, a task is distributed over web, there encounters a series of potential threats that challenges the security of data such as buffer overflow, session hijacking and black hole attacks. A cloud computing based services also face such kinds of security issues where applications deployed on cloud can face same kind of attacks as that on client-server model. Storage as a Service (SaaS) based applications are vulnerable to virus attacks .Online operating systems are available on cloud to the user for free .Viruses can spread as attachments of email, of part of the software or can stay in Master Boot Record (MBR) of the operating system available on cloud. Worms residing on one system in cloud can migrate to another system on its own. Trojan horse is software with wrong intentions. Thus the present system needs an effective mechanism to address the problem encountered in cloud computing.This thesis is intended to provide an enhanced security service in cloud computing model using an enhanced Elliptic Curve Cryptography algorithm for securing user data over cloud. The thesis is also extended to present both the theoretical and empirical results of the proposed improved elliptic curve based public key cryptography to prove that the model is better than the traditional RSA based schemes in terms of encryption, decryption time and key sizes.