A NOVEL AND IMPROVED APPROACH FOR ENHANCING THE SECURITY IN CLOUD COMPUTING

Abstract

Cloud computing provides the facility to access shared resources and common infrastructure, offering services on demand over the network to perform operations that meet changing business needs. The location of physical resources and devices being accessed are typically not known to the end user. Data , which is, stored by the user in the cloud has now been placed under the supervision of cloud provider. Users have lost control over their data. The aim of the thesis is to find how Predicate Based Encryption (PBE) could be used within the Cloud to protect data. Predicate Based Encryption (PBE) is a novel family of public key encryption schemes that allows for expressive, and fine-grained, access control to be integrated within the cryptographic process. Providing an efficient means to realize distributed encrypted access control. Predicate encryption (PE) provides both the access control of cipher texts and the privacy of cipher texts is a new paradigm of public-key encryption. An important application of predicate encryption is a searchable encryption system in a cloud storage, where it enables a client to securely outsource its data to an untrusted cloud server and to search over it even without revealing a key-word itself.