attribute-based keyword search (VABKS). This solution allows a data user, whose credentials satisfy a data owner’s access control policy, to (i) search over the data owner’s outsourced encrypted data, (ii) outsource the tedious search operations to the cloud, and (iii) verify whether the cloud has

text search over the encrypted data. In this paper, we present some combination between verifiable computation and encrypt-then-Mac mechanism. To support the data confidentiality, the fine-grained access control and the correctness of the delegated computing results are well guaranteed at the same time

to be the most significant dispute towards accomplishing fine-grained, cryptographically imposed data access control. Sequentially to have control for data access to PHRs stored in semi trusted severs, a novel patient-centric structure and a suite of methods is proposed in this paper. We leverage attribute-based

and break-glass access under emergency scenarios. Extensive analytical and experimental results are presented which show the security, scalability, and efficiency of our proposed scheme. Index Terms—Personal health records, cloud computing, data privacy, fine-grained access control, attribute-based

and break-glass access under emergency scenarios. Extensive analytical and experimental results are presented which show the security, scalability and efficiency of our proposed scheme. Index Terms—Personal health records, cloud computing, data privacy, fine-grained access control, attribute-based

accomplishing fine-grained, cryptographically imposed data access control. Sequentially to have control for data access to PHRs stored in semitrusted severs, a novel patient-centric structure and a suite of methods is proposed in this paper. We leverage attribute-based encryption (ABE) practices to attain

-grained and scalable data access control for PHRs, we leverage attribute based encryption (ABE) techniques to encrypt each patient's PHR file. Different from previous works in secure data outsourcing, we focus on the multiple data owner scenario, and divide the users in the PHR system into multiple security

Abstract- Cloud computing servers provides platform for users to remotely store data and share the data items to everyone. Personal health record(PHR)has emerged as a patient –centric model of health information exchange. Confidentiality of the shared data is the major problem when patients uses

. This paper enables security in cloud using encryption key that is generated while uploaded files by the user. The random key is generated using random key generation algorithm. The user can transfer their files with the permission of the owner. Multikeyword ranked search over encrypted cloud data establish a

online that are that are accessed from a web browser, while the software and data are stored on the servers. The web is a global hypertext system, has evolved into a distributed application platform, in which the application logic and user interface are two separate entities. As we move toward the cloud