A Study on PGP (Pretty Good Privacy) Using Blockchain

Abstract

E-mail has developed as the Internet has evolved. Encryptions such as Secure/Multipurpose Internet Mail Extensions or Pretty Good Privacy (PGP) are used to ensure privacy and confidentiality. However, the public PGP key is stored on a server and is synchronized with the PGPs of other servers, and thus is not in real time. In addition, public key search, registration, and cancellation are difficult when a key server is down. To solve this problem, we develop a key management server integrating PGP into a blockchain; this allows all participating servers to synchronize registration and deletion in real time.