A New Mail System for Secure Data Transmission in Cyber Physical Systems

Abstract

This paper provides a complete study on email requirements, with special emphasis on its security aspects and architecture. It explores how current protocols have evolved, the environment in which they have been developed and the evolution of security requirements. This paper also analyzes email vulnerabilities and the reasons that have motivated the exploitation of them. The threats and solutions of the most used email protocols today are detailed, such as Simple Mail Transfer Protocol, Post office Protocol, Internet Message Access Protocol protocols, among others. An analysis of the main security solutions proposed in recent years is carried out and how these threats are solved, as well as a comparison of each of them. The result of this work leads us to conclude that it is necessary to make an integral change in the protocols used in the electronic mail in order to have a secure message exchange system that meets all the security requirements demanded today. We are working on a proposal based on blockchain that solves the security problems identified in this work.

Secure Outsourced Blockchain-Based Medical Data Sharing System Using Proxy Re-Encryption

“…Blockchain was first used for managing transaction data, and this is known as cryptocur-rency, e.g., Bitcoin [11] and Ethereum [12]. Blockchain is used to store not only the data of currency transactions, but also various types of historical data such as the distribution process, status of shared items, security protocols [13], and electronic healthcare data [14,15]. In particular, many blockchain-based medical data management systems have been proposed, such as MedRec [16] and MedShare [17].…”