Digital Signature Extension to Authenticate Mail Receivers
Somnuk Puangpronpitag, Wilailak Kaprasit · 2009
Digital signature is a very useful technique to authenticate sender and content of an e-mail. We have pointed out (in our previous work) that receiver authentication cannot be supported by the traditional digital signature software. Yet, in some cases, the receiver authentication is very crucial for a non-repudiation purpose. This paper proposes an extended module for digital signature by adding Receiver Authenticity Tag (RAT) for receivers, who are sent to, cc and bcc. In addition, this work has modified Gnu Privacy Guard (GPG) software as a prototyped program to demonstrate an effectiveness of the extended design.