And no, you can't reach me on telegram, this tool will be deleted soon, after the project is finished.

@ligniform That was why I installed telegram on a blank tablet. It was sad that I had to confirm a phone number, but, Ok, that's the same with almost every messenger now exept Matrix/Elements, but they got other issues.

@ligniform It's a clear breach of European data protection laws and should be prosecuted. I am angry.

@ligniform Actually it is also interesting to see who has me in their adressbook. Another data breach.

@ligniform Oh, I only see them if they answer, I guess.

@ligniform But if they answer, that means I am in their adress book.

@ligniform So they probably shared my phone data (knowingly or unkowningly with third parties without my consent). #datenschutz @dsagentur anybody?

@sven222 @ligniform Yeah, but not for endusers anymore, I guess.... sad that is...

No, Signal doesn’t do that. To establish contacts, the Signal client only sends an cryptographically obfuscated (hashed) version of the phone numbers in your address book to a Signal server (making extra sure that the server’s code has not been tampered with, by using a clever reversal of DRM technology). It does not send the cleartext of your address book. You can find background information on Signal’s technologies and algorithms on Signal’s blog at signal.org/blog/.