![]() ![]() It is a TLS (SSL) layer over the plaintext communication, allowing email servers to upgrade their plaintext communication to encrypted communication. One of the most commonly used email encryption extensions is STARTTLS. Transport layer encryption is often easier to set up and use end-to-end encryption provides stronger defenses, but can be more difficult to set up and use. Encryption may occur at the transport level (aka "hop by hop") or end-to-end. Over the years, various mechanisms have been proposed to encrypt the communication between email servers. With the original design of email protocol, the communication between email servers was in plain text, which posed a huge security risk. Įmail encryption can rely on public-key cryptography, in which users can each publish a public key that others can use to encrypt messages to them, while keeping secret a private key they can use to decrypt such messages or to digitally encrypt and sign messages they send. By means of some available tools, persons other than the designated recipients can read the email contents. ![]() By default, popular email services such as Gmail and Outlook do not enable end-to-end encryption. Most emails are encrypted during transmission, but they are stored in clear text, making them readable by third parties such as email providers. Email encryption may also include authentication.Įmail is prone to the disclosure of information. Email encryption is encryption of email messages to protect the content from being read by entities other than the intended recipients.
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