Authors - Pradnya Gotmare, Aryan Halkude, Manish Potey Abstract - The high pace of the data-driven applications growth in the distributed settings has enhanced the pressure to ensure that the data sharing infrastructure remains secure, efficient, and privacy-sensitive. The classic centralized data sharing architectures have the intrinsic limitations of being single-point-of-failure, untransparent, and unauthorized access to data, and prone to data corruption. To curb these hurdles, this paper proposes a decentralized approach of sharing secure data with the use of blockchain technology. The suggested system also uses the decentralized and unalterable features of blockchain to provide data integrity, transparency, and confidence among the involved parties without involving third-party intermediaries. Access control policies are the policies implemented using smart contracts to allow only trusted users to access the shared data. The solution is to keep sensitive information in off-chain repositories, where blockchain limitations of storage and scalability do not exist, yet cryptographic hash values and access control measures (ACMs) are stored in the blockchain registry. This design makes sure that the data transactions are confidential and data verifiability and auditability maintained.
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