Product Milestone - Confidant Encrypted Email Client that protects your email privacy

Dido Ma
Kepple (previously QLC Chain)
3 min readAug 15, 2019

Another milestone achieved for Confidant! We are delighted to announce that Confidant Encrypted Email Client feature is included in the latest version. Download and start encrypting your emails, IM, files, contact list.

A sneak peek of Confidant Encrypted Email Client

Confidant email client module is newly added in Confidant app that aggregates multiple email accounts across various email services, including Gmail, 163mail, Tencent Enterprise Email, QQ Email and more to come. It supports email with its settings and all data in transmission and storage with high-level encryption between Confidant users.

Try out Confidant

for iOS client

for Android client

Email encryption workflow

PubKeyA: User A public key

PriKeyA: User A private key

PubKeyB: User B public key

PriKeyB: User B private key

Sek: The session key

Confidant Email encryption explanation

Encrypted email transfer is enabled between Confidant users who have their email accounts configured to the one same Confidant Station. All email account configuration settings, email content, and their associated data via Confidant are transmitted and stored with encryption.

If user A has registered email account E1 with Confidant Station N1, as he logs in to Confidant Stations (also known as Circle) N2, N3, N4, his email account is added automatically to his email client hosted by N2, N3. User B can send encrypted emails to from N1, N2 or N3 to A via Confidant. The email can only be decrypted from User A’s Confidant email client.

1. All emails transmitted between Confidant users are encrypted using the AES symmetric-key algorithm.

2. Email backup with encryption on Confidant: The email client module is only integrated into the Confidant app, the Confidant Station stores the encrypted copy of the emails and their configuration settings once the node

3. Email encryption algorithm adopted among Confidant users

  • Encrypted with the user’s public/private key pair
  • Email account settings including username, password, email server URL, port, etc,
  • Encrypted using the AES symmetric encryption algorithm
  • Email content, attachment, contact list and Email preheader information including subject, sender, recipient etc,
Gmail client email content VS Gmail email content sent via Confidant

More email services including those are mainly used for work and daily life communication will be supported in Confidant in the upcoming versions.

If you haven’t got your own Confidant Station, act fast to reserve a life-time free Confidant account to have a sense of Confidant services with instant access to private cloud storage of 20G, encrypted IM and email client that connects multiple email accounts across external services.

Visit https://myconfidant.io/ to learn more

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