End-to-End Encrypted Messaging

This book introduces the core technologies that are used for Internet messaging. The major cryptographic techniques that are used for secure and end to end encryption (E2EE) messaging on the Internet are explored. The notion of "secure" and E2EE messaging and various approaches to address it is discussed. A comprehensive treatment of Pretty Good Privacy (PGP) and OpenPGP as well as Secure/Multipurpose Internet Mail Extensions (S/MIME) is given, as well as the evolutionary improvements to PGP/Ope