Email encryption types list

Here is a list of common email encryption types:

  1. PGP (Pretty Good Privacy): A widely used encryption method that uses public-key cryptography to encrypt and decrypt emails.
  2. S/MIME (Secure/Multipurpose Internet Mail Extensions): A standard for secure email that uses public-key cryptography to encrypt and decrypt emails.
  3. TLS (Transport Layer Security): A cryptographic protocol that provides end-to-end encryption for email communications between servers and clients.
  4. STARTTLS: An extension to the SMTP protocol that allows for the encryption of email communications between servers.
  5. OpenPGP: An open-source implementation of the PGP encryption method.
  6. GPG (GNU Privacy Guard): A free and open-source implementation of the PGP encryption method.
  7. S/MIME with AES: A combination of S/MIME and AES (Advanced Encryption Standard) encryption methods to provide additional security.
  8. PGP with AES: A combination of PGP and AES encryption methods to provide additional security.
  9. End-to-End Encryption: A method that encrypts emails from sender to recipient, without decrypting them on any intermediate servers.
  10. Zero-Knowledge Proof: A method that allows the sender to prove to the recipient that the email was sent without revealing the contents of the email.
  11. Homomorphic Encryption: A method that allows computations to be performed on encrypted data without decrypting it first.
  12. Secure Email Protocols: Protocols such as OTR (Off-the-Record Messaging), OMEMO (OMEMO Encryption), and Signal Protocol that provide end-to-end encryption for email communications.
  13. Email Encryption Services: Services such as ProtonMail, Tutanota, and Mailfence that provide end-to-end encryption for email communications.
  14. Certificate-Based Encryption: A method that uses digital certificates to encrypt and decrypt emails.
  15. Key Exchange: A method that allows the sender and recipient to exchange encryption keys securely.

Note that this is not an exhaustive list, and new encryption methods and protocols are being developed and implemented regularly.