Multifactor Authentication System to Enhance Security Issues in Cloud Computing

Abstract

The rise of big data and data storage in cloud have been peculiar and facilitator to the emergence of big data and cloud computing concepts. In general, cloud computing offers access to data storage, processing and analytics process. The main issue in the cloud storage is the security measure while storing and sharing the data over cloud. To overcome this issue we propose a Multi-factor Authentication Method i.e., automatic rotating password to be generated along with user identification. Along with this we propose a key-aggregate cryptosystem to securely, efficiently and flexible share data with others in cloud storage. This method produce cipher text of constant size such that decryption rights can be assigned to the file. By combining a set of secret key, we can make a compact single key. By considering this compact key, the file has been send to others and will be stored in a restricted secured manner. First, the owner of the data information has been setup for the public system next Key Gen algorithm that generates a public or master/secret key. Making use of this key, user can convert plain text to cipher text. Next user will give input as master secret key by Extract function; it will produce output as aggregate decryption key. This generated key is safely sent to the receiver. Then the user with aggregate key can decrypt the cipher text through the use of Decrypt function.