Secure Data Storage in Cloud Using Cryptographic Algorithms

Cloud computing security refers to protection of data in cloud, its applications and the underlying infrastructure using some set of policies, controls and technologies. Information security or secure data storage, a part of cloud security aims to prevent unauthorized users to access the data and avoids destruction or modification of one's personal information. When one's data is taken to the cloud, lot of security concerns arises and assuring security for the data is still questionable. This paper proposes ways to secure data in cloud using strong cryptographic algorithms like RSA, AES and One Time Pad. Strong cryptographic algorithms are generally mature and unbreakable. Among the existing classical or modern algorithms, one-time pad is an unbreakable algorithm. This paper proposes combination of above three models and analyzes the algorithms by comparing them for storing the data in cloud. The analysis suggests the use of RSA and OTP with variations due to its less time complexity and space complexity.