This book presents state-of-the-art blockchain and AI advances in health care. Healthcare service is increasingly creating the scope for blockchain and AI applications to enter the biomedical and healthcare world. Today, blockchain, AI, ML, and deep learning are affecting every domain. Through its cutting-edge applications, AI and ML are helping transform the healthcare industry for the better. Blockchain is a decentralization communication platform that has the potential to decentralize the way we store data and manage information. Blockchain technology has potential to reduce the role of middleman, one of the most important regulatory actors in our society. Transactions are simultaneously secure and trustworthy due to the use of cryptographic principles. In recent years, blockchain technology has become very trendy and has penetrated different domains, mostly due to the popularity of cryptocurrencies. One field where blockchain technology has tremendous potential is health care, due to the need for a more patient-centric approach in healthcare systems to connect disparate systems and to increase the accuracy of electronic healthcare records (EHRs).

This book includes about concept of cerified email.there are three approaches online, Inline, and offline TTP.In this book, three protocols for secure e-mail that protects both the sender and the receiver, and can be implemented using current e- mail products and existing Internet infrastructure is proposed.First an optimistic approach is applied, that make use of a trusted third party(TTP) but in an optimistic way, TTP is involved only in case of dispute, which is expected to be a rare event. Second, Inline protocols which employ a trusted third party (TTP), which acts as a delivery channel. Both parties send their items to the TTP which checks for their integrity, ensures the validity and fairness of the exchange, and forwards the items to the intended receivers.Third, online protocol, similar to inline protocol, but sender can communicate to receiver directly. After that, TTP manages all extra effort to provide the Integrity, validity, and fairness of the exchange, and forwards the message to receiver. TTP also sends to sender, a receipt of proof that receiver is accepted that message.