PGP Modification for Securing Digital Envelope Mail Using COM+ and Web Services

Certified email is a value-added service for standard email systems, which guarantees the fairness, i.e., the intended recipient gets the mail content if and only if the mail orig-inator receives a non-repudiation receipt showing that the message has been received by the recipient. Most of certi-fied email protocols schemes have more or less weaknesses and/or security flaws. E-mail communication is insecure it can be read and modified as they are passed through the Internet as clear-text. In the worst case, fairness can-not be achieved since one dishonest party can mount some attacks to cheat the honest party such that the latter can-not get the expected items. In this paper, the proposed model is an attempt to standardize a protocol used to encrypt and digitally sign e-mail correspondence. Also, end-to-end security is discussed and a mechanism of key management is proposed if this service is requested by the user. We analyze some certified email protocols and pro-pose some improvements in order to avoid security prob-lems. Component object model andWeb services are used to implement a prototype to the proposed model