Certified exchange of electronic mail (CEEM)

Email has become one of the most important Internet applications in our daily lives. It has many advantages over the postal mail (paper-based mail). In contrast, Email has faster delivery with no regards to the distance or the place of the originator and the recipient. Therefore, email tends to replace some of the paper-based postal mail services with more efficient and advanced services. In order for the email systems to do the job right, security and protection must be employed in a broader range, especially for those services that require special delivery like certified mail. This paper presents the design of a practical certified exchange of electronic mail protocol that can provide the required proofs for both the originator and recipient against any repudiation.