Email has been the epicenter of Internet communication for decades. Unfortunately, the underlying protocol, called SMTP ( Simple Mail Transfer Protocol ), which was developed in 1982, was not designed with security and privacy in mind. In this blog post, we will briefly discuss some of the End To End Encryption (E2EE) technologies, such as OpenPGP, S/MIME, Secure Message Deposit, etc. And also discuss their respective pros and cons.
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OpenPGP
This protocol was originally proposed by Philip Zimmermann in 1991 under the name Pretty Good Privacy (PGP). It was later standardized under the name OpenPGP in 2007. It uses Public Key Cryptography to sign, encrypt, and decrypt emails. A sender signs an email with his or her private key, and encrypts the email using the recipient's public key. The recipient then decrypts the email using his or her private key, and verifies the signature using the sender's public key.
