Blockchain based Secure Data Sharing and Sensitive Information Hiding in Cloud Storage Environment
Nihila Fathima M · International Journal for Research in Applied Science and Engineering Technology · 2019
Cloud computing is the dynamic delivery of Information Technology services over the network. With increased popularity of cloud services, data owners are motivated to store their huge amount of personal data on remote servers. Nevertheless, it brings many security issues since the data stored in cloud is vulnerable to attack. To ensure confidentiality, data owners encrypt their data before outsourcing to cloud. However, to achieve data sharing with sensitive information hiding with other users of cloud, encrypting the whole shared file achieves sensitive data hiding but the shared file will not be accessible to others. In cloud based storage systems like Electronic Health Record system, organization struggle to keep patient data secure, up-to-date, auditable and accessible to all parties together with hiding sensitive data. Existing system of sensitive information hiding made use of sanitizer for sanitizing the data file before uploading to cloud and third party auditor for auditing the integrity of the sensitive data stored a in cloud.This scheme requires to control important database that hire many people and design many process to prevent database from tampering.Unavoidably, all this requires great amount of money and time.Therefore in this paper, Blockchain technology is used in which third party organization can be replaced with distributed database where sensitive data is maintained securely in blocks, lock down by clever cryptography.Hence users can trust that the transactions can be executed exactly as the protocol commands removing the need for a third party thus ensuring integrity of the sensitive data.