Which mail is secure

There are several types of mail that are considered secure, depending on the level of encryption and authentication used. Here are some examples:

  1. End-to-End Encrypted Mail: This type of mail is encrypted from the sender's email client to the recipient's email client, using public-key cryptography. Examples include:
    • ProtonMail: A free, open-source email service that uses end-to-end encryption.
    • Tutanota: A German-based email service that uses end-to-end encryption and is GDPR compliant.
    • Mailfence: A secure email service that uses end-to-end encryption and is based in Belgium.
  2. PGP (Pretty Good Privacy) Mail: PGP is a popular encryption method that uses public-key cryptography to encrypt and decrypt emails. Many email clients, such as Mozilla Thunderbird, support PGP.
  3. S/MIME (Secure/Multipurpose Internet Mail Extensions) Mail: S/MIME is a standard for encrypting and authenticating emails. It uses public-key cryptography and is supported by many email clients, including Microsoft Outlook.
  4. TLS (Transport Layer Security) Mail: TLS is a cryptographic protocol that provides end-to-end encryption for emails. It's commonly used by email providers, such as Gmail and Outlook, to encrypt emails in transit.
  5. OpenPGP Mail: OpenPGP is an open-source implementation of PGP that allows for end-to-end encryption and digital signatures.

When evaluating the security of an email service, consider the following factors:

  1. Encryption: Does the service use end-to-end encryption, or does it only encrypt emails in transit?
  2. Authentication: Does the service use two-factor authentication (2FA) or other forms of authentication to verify the identity of users?
  3. Key management: How does the service manage public and private keys, and how are they stored?
  4. Server-side encryption: Does the service store emails on servers that are encrypted at rest?
  5. Transparency: Is the service transparent about its security practices and protocols?

Remember that even with secure email services, it's still important to follow best practices for email security, such as: