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Research Paper | Computer Science | Volume 15 Issue 2, February 2026 | Pages: 1600 - 1608 | India
Protecting Multi-Source Cardiovascular Disease Data Through an Innovative Token-Based Pure Proof of Stake Blockchain
Abstract: The rapid growth of Cardiovascular Disease (CVD) data from heterogeneous sources, including diagnostic imaging systems, electrocardiography devices, wearable sensors, and public research repositories, has created major challenges in ensuring data confidentiality, integrity, controlled access, and scalable management. Conventional centralized data storage architectures are prone to security breaches, and limited audit transparency. To address these limitations, this paper proposes a secure and scalable Token-Based PPos Heart chain (TPPoSHChain) framework for the management of multi-source CVD datasets by integrating blockchain technology, decentralized identity, authenticated encryption, and token-based access governance. The framework employs a hybrid on-chain/off-chain architecture, where the Algorand blockchain with a Pure Proof of Stake (PPoS) consensus mechanism provides immutable audit logging and access control enforcement, while encrypted datasets are stored off-chain in the InterPlanetary File System (IPFS) to enhance scalability. ChaCha20-Poly1305 authenticated encryption is used to protect datasets prior to storage and transmission, ensuring both confidentiality and integrity. Decentralized Identifiers (DIDs) establish a self-sovereign identity layer for data contributors, and actors, eliminating reliance on centralized identity providers. A blockchain-supported token-based access control mechanism enables fine-grained authorization, usage traceability, and secure cross-institutional data sharing. Experimental evaluation demonstrates that the proposed TPPoSHChain framework significantly improves transaction throughput, reduces latency, lowers storage overhead, and achieves efficient encryption performance than other existing models, making it well suited for secure and scalable CVD datasets.
Keywords: Cardiovascular Disease dataset, Algorand Blockchain, Decentralized Identifiers, ChaCha20-Poly1305, InterPlanetary File System
How to Cite?: D. Chandrakantham, D. Gayathri Devi, "Protecting Multi-Source Cardiovascular Disease Data Through an Innovative Token-Based Pure Proof of Stake Blockchain", Volume 15 Issue 2, February 2026, International Journal of Science and Research (IJSR), Pages: 1600-1608, https://www.ijsr.net/getabstract.php?paperid=SR26226150952, DOI: https://dx.dx.doi.org/10.21275/SR26226150952