Email encryption is encryption of email messages to protect the content from being read by entities other than the intended recipients. Email encryption may also include authentication.
Email is prone to the disclosure of information. Most emails are encrypted during transmission, but they are stored in clear text, making them readable by third parties such as email providers.[1] By default, popular email services such as Gmail and Outlook do not enable end-to-end encryption.[2] By means of some available tools, persons other than the designated recipients can read the email contents.[3]
Email 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.
^"Email encryption in transit". Gmail Help. Google Inc. Retrieved 2020-06-15.
^"Enable hosted S/MIME for enhanced message security". GSuite Admin Help. Google Inc. Retrieved 2020-06-15.
^SMEmail – A New Protocol for the Secure E-mail in Mobile Environments, Proceedings of the Australian Telecommunications Networks and Applications Conference (ATNAC'08), pp. 39–44, Adelaide, Australia, Dec. 2008.
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