What Does End-to-End Encryption (E2EE) Mean?

End-to-end encryption (E2EE) is an asymmetrical approach to encrypting and decrypting data at the device level. E2EE was originally developed to protect the content of email messages as they traveled across the internet.

Techopedia Explains End-to-End Encryption (E2EE)

E2EE converts plain text to ciphertext at the device level. In this data protection scheme, the plain text contents of an email message can only be viewed by the sender and the receiver. Servers along the transmission route can see routing information, but not the message’s contents.