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Dib2Qm

Messenger for secured chats and groups (end-to-end encrypted)
New in version 0.22.46
- (Internal improvements/ from before:)
- Improved synchronization of keys
- Status markers within individual chats
- Resulting in less data loss in case of connection problems
Dib2Qm (aka Dibdib Messenger)

Messenger for secured chats and groups (end-to-end encrypted).

Dib2Qm is a messenger that works via e-mail servers, end-to-end encrypted.

Text messages are not only end-to-end encrypted, they also get stored on your
device in an encrypted way. Images, attachments etc. can be sent -- encrypted,
of course, but since they depend on third-party programs, they are stored
unencrypted. Dib2Qm makes use of your device's 'Download' folder (also for
backups and archives).

All you need is an e-mail account (on a server with standard IMAP and SMTP
services), for which a small app like this one is allowed to access the
services -- and some patience :-)

Just try it out! -- on a non-critical device (And if your e-mail provider blocks
it, use a different provider. Dib2Qm does not depend on a centralized server.)

- You can only chat with people who also use Dib2Qm.
- After the setup, please first start the messaging server (via menu).
- If you get a connection, the status should turn green (... 'ON').
- Add a contact, via menu: you have to enter the other one's e-mail address.
- If you then touch the new contact, you will be asked to send the 'invitation'
(i.e. the key info for exchanging secured messages).
- Once the key exchange is completely done (black/red, orange, green), the chat
works similar to other apps.

If one of your chats gets 'stuck' (due to a key exchange problem), just send
another 'invitation' from within the chat.

It is possible to use the address of your device's 'Google account', but they
insist on you explicitly allowing messenger apps: you would log in with your
browser (!), go to 'Settings', 'Forwarding...IMAP', 'Enable IMAP', 'Save', then
to 'Accounts', 'Other ... settings', '...Security', '2-Step...', 'Off', and
'Connected apps', 'Allow less secure', 'On'.

Strange? It is easier to use an extra e-mail account for Dib2Qm, but depending
on your provider you might still have to allow IMAP services. Both, using the
device's account address or using a dedicated e-mail address for Dib2Qm, have
their advantages and disadvantages ...

If you want to do a complete re-start, go to the device's settings, clear the
app data, then open a file manager, clear the 'Download/dibdib' data, and then
you can start the app a-fresh.

Packages

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 0.22.46 (2246) suggested Added on 2020-06-02

    This version requires Android 4.0.3 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • control vibration
      Allows the app to control the vibrator.
    • read call log
      This app can read your call history.

    Download APK 0.6 MiB PGP Signature | Build Log

  • Version 0.22.44 (2244) - Added on 2020-03-30

    This version requires Android 4.0.3 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • control vibration
      Allows the app to control the vibrator.
    • read call log
      This app can read your call history.

    Download APK 0.6 MiB PGP Signature | Build Log

  • Version 0.22.40 (2240) - Added on 2020-03-23

    This version requires Android 4.0.3 or newer.

    It is built and signed by F-Droid, and guaranteed to correspond to this source tarball.

    Permissions
    • view network connections
      Allows the app to view information about network connections such as which networks exist and are connected.
    • have full network access
      Allows the app to create network sockets and use custom network protocols. The browser and other applications provide means to send data to the internet, so this permission is not required to send data to the internet.
    • read your contacts
      Allows the app to read data about your contacts stored on your phone, including the frequency with which you've called, emailed, or communicated in other ways with specific individuals. This permission allows apps to save your contact data, and malicious apps may share contact data without your knowledge.
    • read phone status and identity
      Allows the app to access the phone features of the device. This permission allows the app to determine the phone number and device IDs, whether a call is active, and the remote number connected by a call.
    • read the contents of your shared storage
      Allows the app to read the contents of your shared storage.
    • modify or delete the contents of your shared storage
      Allows the app to write the contents of your shared storage.
    • control vibration
      Allows the app to control the vibrator.
    • read call log
      This app can read your call history.

    Download APK 0.6 MiB PGP Signature | Build Log