End to end encryption


What does end to end encrypted mean

End-to-end encryption (E2EE) is a system of secure communication where only the users of the given communication can read the messages - no third party can access the data while it's being transferred from one device to another. In E2EE, the data is encrypted on the sender's system or device, and only the intended recipient with the valid decryption key can decrypt it.
In other words, E2EE prevents unintended users, including third parties (such as the server carrying the data), from reading or modifying data when only the intended readers should have this access and ability.

Secure email encryption service

Most email providers use secured channels to send your messages, but they do not typically use E2EE to encrypt your message - so if the message data is stolen during the sending, the attacker can read the message itself.
Some email providers, such as Protonmail, provide PGP encryption to encrypt your messages. PGP is a technology that allows you to encrypt the message body and attachments similarly to E2EE but the header is not encrypted so the message can actually reach its destination correctly and you can view basic details in the message list about it.
For vast amount of email communication, PGP is a good compromise, as it keeps your message content safe but is easy to use on a range or mail servers and email apps.

End to end encryption messenger

Many chat and message apps now provide End-to-end encryption to make your communication more secure! One of these is Google's Messages where you can enable the encryption per Conversation with a specific contact. The limitation is, however, that both you and the other participant of the chat need to use the Messages app to make use of the Google messages end to end encryption.
Whatsapp uses end to end encryption for all your messages by default and it is optional for your message backup. How to turn off end to end encryption

Symmetric encryption algorithms

What makes end-to-end encryption unique compared to other encryption systems is that only the endpoints - the sender and the recipient - are capable of decrypting and reading the message. Symmetric key encryption, which is also known as single-key or secret key encryption, also provides an unbroken layer of encryption from sender to recipient, but it uses only one key to encrypt messages.

Encryption in eM Client

eM Client can use S/MIME and PGP enxryption for your messages, which you can read about in our Email Encryption and Digital Signature guide. You can also create your own PGP key and easily use it in eM Client and look up other users' public keys in the native eM Keybook service as well as Protonmail and keys.openpgp.org to arrange secure communication with your contacts.

Download eM Client below to start a 30-day trial and see if it's the right secure email app for you!