Byzantine Fault-Tolerant Confidentiality

As the world becomes increasingly interconnected, more and more important services such as business transactions are deployed as access anywhere services – services that are accessible by remote devices through the Internet and mobile networks. Such services often must access confidential data to provide service. For example, an online bank service must access a user’s checking account to process an online transfer request. In such a scenario, guarantees of availability, integrity, and confidentiality are essential. By availability, we mean that services must provide service 24/7 without interruption. By integrity, we mean that services must process clients’ requests correctly. By confidentiality, we mean that services must restrict who sees what data.