Frequently Asked Questions
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+- - - General - - -
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What is Delta Chat?
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Delta Chat is a new chat app that sends messages via e-mails, encrypted if possible, with Autocrypt. You do not have to sign up anywhere, just use your existing e-mail account with Delta Chat.
+ +@@ -131,6 +77,8 @@
With Delta Chat, you can write to every existing e-mail address - even if the recipient is not using the Delta Chat app. No need for the recipient to install the same app as yours, as with other messengers.
+ +@@ -155,6 +103,8 @@ the same e-mail servers
@@ -173,6 +123,8 @@ the same e-mail servers
Other messages do not appear automatically, and are to be found in the main menu at Contact requests. If desired a chat can be started from there.
+ +@@ -187,6 +139,8 @@ the same e-mail servers
@@ -199,6 +153,8 @@ the same e-mail servers
- Yes. Beside the plain text, all e-mail attachments are displayed as separate messages. Outgoing messages get attachments as needed automatically.
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@@ -226,6 +182,8 @@ your contacts will re-receive your profile picture, even if they add a new device. + +
@@ -238,6 +196,8 @@ device.
- Yes. If incoming e-mail lacks a plain text part, HTML-emails is converted to plain text in the app. Outgoing e-mails always use plain text.
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@@ -260,6 +220,8 @@ access token is used. Code if you want to verify that your credentials are handled securely. We are happy about feedback which makes the app more secure for all of our users. + +
@@ -310,6 +272,8 @@ about feedback which makes the app more secure for all of our users. + +
@@ -332,6 +296,8 @@ about feedback which makes the app more secure for all of our users.
@@ -345,6 +311,8 @@ about feedback which makes the app more secure for all of our users.
@@ -361,7 +329,7 @@ attacker. All Messages in a verified chat view are e2e-encrypted, and members can join by scanning a “QR invite code”. All members are thus connected with each other through a chain of invites, which guarantee cryptographic consistency against active network or provider attacks. -See https://countermitm.readthedocs.io/en/latest/new.html +See countermitm.readthedocs.io for the R&D behind this feature.
@@ -406,6 +376,8 @@ If you want to join the group again later on, ask another group member to add yo can still write, but are no longer notified of any new messages. + +
@@ -427,6 +399,8 @@ can still write, but are no longer notified of any new messages.
@@ -453,6 +427,8 @@ messages are not encrypted until an Autocrypt-compliant app is available again.< use the corresponding setting in “Settings / Advanced settings”. + +
@@ -469,6 +445,8 @@ This only secures the connection between your device and your e-mail server. Whereas e2e-encryption provides safety between your device and a friend’s device. + +
@@ -497,6 +475,8 @@ the connection is safe.
For transport encryption, this state is just shown there
+ +@@ -514,6 +494,8 @@ the connection is safe.
If there is no padlock, the message is usually transported unencrypted e.g. because you or the sender have turned off end-to-end-encryption, or the sender uses an app without support for end-to-end-encryption.
+ +@@ -531,6 +513,8 @@ Delta Chat implements the “countermitm” protocols to achieve protection against active network attacks, going beyond the opportunistic base protection of Autocrypt, see questions about “Verified Groups”. + +
@@ -559,6 +543,8 @@ matter if they change e-mail clients, devices, setups etc. That’s why there is no verification checkmark, even if you have verified the contact. + +
@@ -577,18 +563,20 @@ Delta Chat private key is leaked, and someone has a record of all your in-transit messages, they will be able to read them.
Note that if anyone has seized or hacked your running phone, -they will typically be able to read all messages, no matter if Perfect -Forward Secrecy is in place or not. Having access to a single device -from a member of a group, will typically a lot of the social graph. -Using e-mail addresses that are not easily tracked back to persons -helps group members to stay safer from the effects of device seizure.
+Note that if anyone has seized or hacked your running phone, they will +typically be able to read all messages, no matter if Perfect Forward Secrecy +is in place or not. Having access to a single device from a member of a group, +will typically expose a lot of the social graph. Using e-mail addresses that +are not easily tracked back to persons helps group members to stay safer from +the effects of device seizure.
We are sketching ways to protect communications better against the event of device seizure.
@@ -619,6 +607,8 @@ end-to-end-encryption protected, see also this upcoming ↑ Top
@@ -638,6 +628,8 @@ RFC.
If you don’t have a key or don’t even know you would need one - don’t worry: Delta Chat generates one as needed, you don’t have to hit a button for it.
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