Study of PGP's <i>Principium</i>

Abstract

Pretty Good Privacy is a kind of software used for Email encrypting. This paper expounds its algorithm and running principle. PGP's trust model and the functions of each component in PGP Message are analyzed. Meanwhile, the paper deeply illuminates the whole procedure of sending and receiving PGP message. In the end, PGP's applications are presented, and its security is briefly discussed.