End-to-End Encryption
and Digital Signing

In short

  1. End-to-End Encryption (E2EE) It's a method used for securing encrypted data while it is moving from the source to the destination. In End-to-End Encryption, the data is encrypted on the sender's system and only the intended recipient will able to decrypt it. Nobody in between (be they an Internet service provider, application service provider or hacker, ...) can read it or tamper with it - thereby providing a great deal of confidentiality and protection to all of your communications.
  2. Digital Signature It's an equivalent of a handwritten signature or stamped seal, but offering far more inherent security - a digital signature is intended to solve the problem of tampering and impersonation in digital communications - and gives the absolute authenticity and integrity to all of your messages.

The process

Simply said

E2EE

How to

  1. How to generate your key pair ?
    1. Go to Settings > Messages > Encryption and click on Add personal key.
    2. Click on Generate a new personal key.
      • - Select the email address for which you would like to generate your key pair.
        - Write your passphrase and confirm it by entering it again.
        - Tick the box Publish on Public key server which will upload your public key onto the public key server - a common place where public keys of different people resides.
        - Then click on Generate a new personal key.
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  3. How to import your private key ?
    1. Go to Settings > Messages > Encryption and click on Add personal key.
    2. Click on Import a key.
    3. Copy and paste your private key text and click on Import or click on Import from file to import your private key via file.
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  5. How to export your personal key ?
    1. Go to Settings > Messages > Encryption and click on your Personal key.
    2. Click on Export. Place it on your safest digital storage.
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  7. How to generate a revocation certificate ?
    1. Go to Settings > Messages > Encryption and click on your Personal key.
    2. Click on Generate revocation certificate.
    3. Enter your passphrase and click on Ok.

    E2EE It is strongly recommended to generate your revocation certificate (right after you generate your key pair) and place it on the safest digital storage that you have – as it will allow you to revoke your Personal Key in case of forgotten passphrase or key-compromised and let people know that you no longer use that key pair.

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    • ACT IMMEDIATELY IF SOMEONE GETS YOUR PRIVATE KEY
    • If you lose your private key (or doesn't want to use it anymore), it's important to revoke it immediately before someone else uses it to read your encrypted data or forge your digital identity. Also, after you're done revoking it, send an email to all of your contacts and let them know that you don't use that key anymore and (if possible) provide them your new public key as well.

  9. How to send your public key by email ?
    1. Go to your messages and click on New.
    2. Fill-up all the fields as usual and write down your email message.
    3. Go to Attachment and click on Attach my public key.
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  11. How to add a public key ?
    1. Go to Settings > Messages > Encryption and click on Add public key.
    2. Click on Search in public key servers.
    3. Write down the email ID of your contact person, select the public key from the list and click on Import OR Click on Import a key, copy and paste the public key content of your contact and click on Import or click on Import from file to import your contact public key via file.
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    E2EE
  13. How to export a public key ?
    1. Go to Settings > Messages > Encryption and click on Public key of your contact.
    2. Click on Export.
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  15. How to verfiying the revocation status of a public key via Update feature ?
    1. Go to Settings > Messages > Encryption and click on Public key of your contact.
    2. Click on the Update from public server.
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  17. How to send a digitally signed email ?
    1. Go to your messages and click on New.
    2. Fill-up all the fields as usual and write down your email message.
    3. Now click on the down-arrow over the Send button.
      • Click on Sign and Send.
      • Enter your passphrase and click on OK.
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  19. How to send an encrypted and digitally signed email ?
    1. Go to your messages and click on New.
    2. Fill-up all the fields as usual and write down your email message.
    3. Now click on the down-arrow over the Send button.
      • Click on Sign, Encrypt and Send.
      • Enter your passphrase and click on OK.
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  21. How to decrypt an encrypted email ?
    1. Go to your messages and click on Inbox.
    2. Click on the email which you would like to decrypt and read.
    3. Enter your passphrase and click on OK.
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  23. How to revoke your personal key ?
    1. Go to Settings > Messages > Encryption and click on your Personal key.
    2. Click on Revoke.
    3. Read the warning message and click on Yes if you want to proceed.
    4. Enter your passphrase and tick the box Publish on public key server so that everyone can see that it has been revoked and you no longer use it.
    5. Click on Revoke.

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  25. How to delete your key pair ?
    1. Go to Settings > Messages > Encryption and click on your Personal key.
    2. Click on Delete.
    3. Read the warning message and click on Yes if you want to proceed.
    4. Enter your passphrase and click on Ok.

    E2EE If you want to use this key pair in the future then make sure that you've already exported and saved it in the most safest digital storage that you have. Otherwise, after deleting your key pair you'll have no way to retreive it back.

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  27. How to delete a public key ?
    1. Go to Settings > Messages > Encryption and click on Public key of your contact.
    2. Click on Delete.
    3. Click on Yes.
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