Securing IoT Healthcare Data: The Power of Blockchain and Homomorphic Encryption

The rapid progress of the Internet of Things (loT) and the increasing use of medical software in this field have raised considerable concerns regarding the security and privacy of sensitive health data. In response to these difficulties, blockchain technology has arisen as a viable remedy, offering autonomous and unchangeable data storage as well as accessible records of transactions. Nevertheless, conventional blockchain systems continue to encounter constraints in maintaining data confidentiality. This study presents an innovative method for improving privacy protection in medical devices based on the Internet of Things (loT). It achieves this by combining homomorphic techniques for encryption with blockchain technology. Homomorphic encryption enables the execution of computations on data that has been encrypted without the need for decryption, ensuring the data's privacy during the entire computational procedure. Authorized parties can process and evaluate the encrypted data without disclosing the real contents, thus safeguarding patient privacy. In addition, this approach integrates smart contracts into the blockchain network to enforce access control and establish data-sharing policies. The smart contracts offer precise permission settings, guaranteeing that only authorized entities can access and exploit the protected data.