Practical Implementation of Secure Email System Based on IBE, DNS

Abstract

Email is currently the most widely used communication systems in daily life. To improve security and efficiency, most email systems use Public Key Infrastructure (PKI) as the mechanism to implement email security, but PKI based systems suffer from difficult and expensive certificate management and problems in scalability. This paper proposes the practical open standard implementation of a secure email system based on IBC which uses Domain Name System (DNS) as the mechanism for public key exchange. The message payload is encrypted with a per-email symmetric key generated from a random secret value.