WShBK: Blockchain Enabled Whirlpool Secure Hash Based Biometric Integrated Key Distribution Function for Medical Data Storage and Access in Cloud Network

The advancement of medical data handling from conventional paper documents to electronic records enabled secure data movement between authenticated legitimate users. While current identity verification algorithms offer unique solutions, they face significant limitations related to data storage scalability, potential privacy breaches, high computational costs, and the lack of standardized protocols. In order to alleviate these constraints, the research proposes a biometric–Blockchain-based authentication Scheme, a Whirlpool Secure Hash-based Biometric Integrated Key Distribution Function (WShBK) for secure data storage and access in a cloud network. The proposed strong cryptographic scheme generates two unique keys derived from the biometric trait of the patient for both encryption and authentication purposes, ensuring strong protection while accessing and storing the data. Furthermore, the advanced encryption standard WShBK (AWShBK) encryption algorithm leverages the strength of a symmetric block cipher and the unique key, offering robust protection against breaches by rendering intercepted data without the correct decryption key. Furthermore, Hybrid biometric-based zero-knowledge proof (HyBZKP) verification offers secure and private transaction validations while sustaining the blockchain integrity. These advancements of the proposed WShBK scheme improve 0.52 encryption rate and 0.53 decryption rate for 250 users analyzed with an attack compared to other cutting-edge models.