Skip to main content


End-to-End Encryption is good but metadata protection counts as much. Names, group descriptions and memberships, avatars, who talks to whom ...

Both #deltachat and #signal go to great length to protect all the metadata that WhatsApp grants itself gratuitously. #Matrix stores similar scales of metadata on their servers, even if you can choose which server stores it.

Everything is better than #Telegram which additionally stores message contents in all group chats/channels and most 1:1 chats.

in reply to Ⓥ Gregory Trolliet Ⓐ🔻 🇵🇸

@faket we are lightly following its developments but are not impressed by its UI/UX, and also don't think they particularly care for resilience (they are blocked since >15 months in russia, and don't do much about it, for example), also they don't appear to care much for people with small data plans and bad networks, and rather tune everything for resource-rich always-connected users. They also appear to be going down the crypto-coin rabbithole quite a bit. YMMV.
in reply to Delta Chat

How do you get these information about WhatsApp? Is in the app itself?
in reply to Ivan Enderlin 🦀

@hywan most of the info about whatsapp is found in whatsapp.com/legal/privacy-pol…
in reply to Delta Chat

Wait. How does Delta protect metadata? I thought you had anonymous accounts but you can't protect metadata.
in reply to Adnan

@ahalam all the mentioned metadata in the top post resides in the encrypted parts of messages. The server does not see group descriptions, names, avatars etc. We'll soon do a blog post on this and recent advances to "zero metadata" operations, stay tuned :)
in reply to Delta Chat

@ahalam can't wait to read your blog post, will be enlightening for many of us. Metadata encryption is a trending topic ^^
in reply to Delta Chat

Actually, WhatsApp offers the option to encrypt backups, and Apple offers the option to encrypt iCloud. However, not all users will take advantage of this, so its usefulness is limited.

Personally, I hope that DC-iOS will one day get iCloud backup support. Provided it is not too complicated to implement. In my opinion, it makes more sense than before, since chatmail servers only temporarily store emails.

in reply to Delta Chat

Its simply frightening that a company thinks they have the right to do this.

What kind of sick minds do these folk have?

Oh wait, its a Zuckerberg thing right...

'nuff said.

in reply to Delta Chat

i don't even believe WA's e2e encryption is real. When you reactivate whatsapp from a new phone, without the transfer protocol, but from the same number, you can see the plaintext of all messages you missed. If the key was in your "end" (old phone) only, there would be no possible way to see those messages.

Whereas for Signal if you don't explicitly back up and transfer keys, you won't be able to decrypt messages your received in the meantime.

in reply to ebrum

@ebrum This is likely caused not by decrypting queued messages, but by the sender automatically re-encrypting the messages to your new device and resending them when key change is detected, see signal.org/blog/there-is-no-wh… (and theguardian.com/technology/201… for the referenced article).