Enhancing cloud security using multi- Level dna cryptography

Cloud computing can increase productivity and minimize costs, hence many companies are embracing it, but at the same time it constitutes many security risks and challenges. Cloud computing provides people the way to share private resources and services. Since data are shared between distributed resources via the network in the open environment there is always security threat. Due to lack of proper security control policy and weakness in saving private data that lead to many vulnerability in cloud computing. The latest development on the field of cryptography is DNA cryptography. It has emerged after the disclosure of computational ability of Deoxyribo Nucleic Acid (DNA). DNA cryptography uses DNA as the computational tool along with several molecular techniques to manipulate it. Due to very high storage capacity of DNA, this field is becoming very promising. The objective of this research paper is to provide two level cryptographic algorithms using DNA and XOR operation to enhance the security in cloud. Our aim is to build a secure and confidential data over a cloud