Question

Different types of algorithms used for cloud security

Answer 1

Cloud computing is the delivery of computing services over the Internet. Cloud services allow individuals and businesses to use software and hardware that are managed by third parties at remote locations. Examples of cloud services include online file storage, social networking sites, webmail, and online business applications. The cloud computing model allows access to information and computer resources from anywhere that a network connection is available. Cloud computing provides a shared pool of resources, including data storage space, networks, computer processing power, and specialized corporate and user applications. Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. Because of these benefits each and every organizations are moving their data to the cloud. So there is a need to protect that data against unauthorized access, modification or denial of services etc. To secure the Cloud means secure the treatments (calculations) and storage (databases hosted by the Cloud provider). Security goals of data include three points namely: Availability Confidentiality, and Integrity. Confidentiality of data in the cloud is accomplished by cryptography. Cryptography, in modern days is considered combination of three types of algorithms. They are (1) Symmetric-key algorithms (2) Asymmetric-key algorithms and (3) Hashing. Integrity of data is ensured by hashing algorithms.Data cryptography mainly is the scrambling of the content of the data, such as text, image, audio, video and so forth to make the data unreadable, invisible or meaningless during transmission or storage is termed Encryption. The main aim of cryptography is to take care of data secure from invaders. The opposite process of getting back the original data from encrypted data is Decryption, which restores the original data. To encrypt data at cloud storage both symmetric-key and asymmetric-key algorithms can be used. Cloud storage contains a large set of databases and for such a large database asymmetric-key algorithm’s performance is slower when compared to symmetric-key algorithms.