Yes it uses your phone number. You now have the option to use a username though.
Personally, while I totally understand the criticism, this is not an attack vector I am concerned with. I want a private messenger that hides the content and metadata of my messages from ad companies, spying neighbors, and the government. Signal does all of this.
I haven’t used Signal.
Is your ‘registered Signal number’ your phone handset number?
From this page:
https://support.signal.org/hc/en-us/articles/360007318691-Register-a-phone-number
[You are right, Delta Chat uses AutoCrypt, which is OpenPGP based.]
Yes it uses your phone number. You now have the option to use a username though.
Personally, while I totally understand the criticism, this is not an attack vector I am concerned with. I want a private messenger that hides the content and metadata of my messages from ad companies, spying neighbors, and the government. Signal does all of this.