Strengthen Cloud Computing Security with Enhanced Two Factor Authentication and Encryption

Cloud computing has become a buzzword that nearly everyone has heard but only few can truly understand its correct meaning. Today, cloud has taken over the IT landscape. Cloud computing refers to menu of hosting services usually provided over the internet on a usage or metered basis, while at the same time leveraging infrastructure shared by multiple users. Cloud itself is maintained by cloud service providers through networked “server farms”. They offer their subscribers unlimited availability and data storage, along with the seamless access to software, application provisioning and automatic upgrades. Security is one of the most concerning downsides while using cloud services. As organisations and individuals store data in cloud and if this data isn‟t properly protected loss and exposure can happen. Therefore confidentiality, authentication and access control are the challenging factors in data security. Our work attempts to overcome these types of data security concerns. In this paper to ensure authentication, a strong authentication mechanism using muti-step authentication has implemented based on dynamic one time password technique. This technique is very much secure, robust and highly efficient. The produced mobile token which is valid for only a small session is used by client to authenticate itself. For data storage security and information security over cloud AES-256 encryption and MD5 hashing is used. Access controls and permissions on data accessibility are also gets implemented. Our work mainly deals with cloud computing security model.