Secure and Privacy-Preserving Data Sharing and Collaboration in Mobile Healthcare Social Networks of Smart Cities

Mobile healthcare social networks (MHSN) integrated with connected medical sensors and cloud-based health data storage provide preventive and curative health services in smart cities. The fusion of social data together with real-time health data facilitates a novel paradigm of healthcare big data analysis. However, the collaboration of healthcare and social network service providers may pose a series of security and privacy issues. In this paper, we propose a secure health and social data sharing and collaboration scheme in MHSN. To preserve the data privacy, we realize secure and fine-grained health data and social data sharing with attribute-based encryption and identity-based broadcast encryption techniques, respectively, which allows patients to share their private personal data securely. In order to achieve enhanced data collaboration, we allow the healthcare analyzers to access both the reencrypted health data and the social data with authorization from the data owner based on proxy reencryption. Specifically, most of the health data encryption and decryption computations are outsourced from resource-constrained mobile devices to a health cloud, and the decryption of the healthcare analyzer incurs a low cost. The security and performance analysis results show the security and efficiency of our scheme

Coercion-resistant Proxy Voting

In general, most elections follow the principle of equality, or as it came to be known, the principle of “one man – one vote”. However, this principle might pose difficulties for voters, who are not well informed regarding the particular matter that is voted on. In order to address this issue, a new form of voting has been proposed, namely proxy voting. In proxy voting, each voter has the possibility to delegate her voting right to another voter, so called proxy, that she considers a trusted expert on the matter. In this paper we propose an end-to-end verifiable Internet voting scheme, which to the best of our knowledge is the first scheme to address voter coercion in the proxy voting setting

Secure Cloud Email System On Privacy Protocol And Identity-Based Encryption

A flexible primitive alluded to as conditional identity-based broadcast PRE (CIBPRE) and formalizes its semantic security. CIBPRE enables a sender to encode a message to numerous collectors by indicating these beneficiaries' characters, and the sender can delegate a re-encryption key to an intermediary with the goal that he can change over the underlying ciphertext into another one to another arrangement of planned recipients. Also, the re-encryption key can be related with a condition to such an extent that lone the coordinating ciphertexts can be re-encoded, which enables the first sender to implement get to control over his remote ciphertexts in a fine-grained way. We propose a proficient CIBPRE conspire with provable security. In the instantiated plot, the underlying ciphertext, the re-encoded ciphertext and the re-encryption key are all in consistent size, and the parameters to create a re-encryption key are free of the first collectors of any underlying ciphertext

ROLE BASED SECURED ACCESS OF DATA IN CLOUDS

In mobile wireless sensor network, coverage and energyCloud computing is a type of internet-based computing that provides shared computer processing resources and data to computers and other devices on demand. It is a model for enabling ubiquitous, on-demand access to a shared pool of configurable computing resources e.g., computer networks, servers, storage, applications and services, which can be rapidly provisioned and released with minimal management effort. Attribute-based access control defines an access control paradigm whereby access rights are granted to users through the use of policies which combine attributes together. The policies can use any type of attributes such as user attributes, resource attributes, object and environment attributes etc. This model supports Boolean logic, in which rules contain "if-then" statements about who is making the request, the resource and the action. The main problem in attribute–based access control is not having user-centric approach for authorization rules. In ABAC model role hierarchy and object hierarchy is not achieved and restriction in level of expressiveness in access control rules.Secured role-based access control allows managing authorization based on rule-based approach where rules are under the control of data owner and provides enriched role-based expressiveness including role and object hierarchies. Data user without the knowledge of data owner cannot use the cloud server where privilege is provided to data user by data owner. Access control computations are delegated to the cloud service provider, being this not only unable to access the data, but also unable to release it to unauthorized parties. A identity-based proxy re-encryption scheme has been used in order to provide a comprehensive and feasible solution for data centric-approach. Semantic web technologies have been exposed for the representation and evaluation of the authorization model

Attribute-Based Encryption Scheme for Secured data Storage in Cloud Computing

This a storage security model in Cloud Computing and making a considerable measure of convincing purposes behind organizations to convey cloud-based storage. For another business, start-up costs are fundamentally decreased in light of the fact that there is no compelling reason to contribute capital in advance for an inner to help the business. By a long shot, the main inquiry customers considering a move to cloud storage ask is regardless of whether their data will be secure. Stored data offsite doesn't change data security necessities; they are the same as those confronting data put away on location. Security ought to be based on business prerequisites for particular applications and data sets, regardless of where the data is stored. We trust that data storage security in Cloud Computing, a zone brimming with challenges and of fundamental significance, is still in its earliest stages now, and numerous examination issues are yet to be distinguished. In this paper, we examined the issue of data security in cloud data storage, to guarantee the rightness of customers' data in cloud data storage. We proposed a Hierarchical Attribute-Based Secure Outsourcing for moldable Access in Cloud computing which likewise guarantees data storage security and survivability accordingly giving put stock in condition to the customers. To battle against unapproved data spillage, delicate data must be encoded before outsourcing in order to give end-to-end data confidentiality affirmation in the cloud and past. It upgrades the security in the proposed model successfully.