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Re:Technology preview: Sealed sender for Signal by walterbell on Monday October 29, 2018 @08:12PM (#18332881)
Wire supports email-only registration at https://app.wire.com (from a desktop web browser). The account can then be used to login from mobile or web.

This approach enables "easy" mode for casual users who prefer phone number registration, while supporting additional privacy for others.

Re:Technology preview: Sealed sender for Signal by HostFat on Monday October 29, 2018 @08:17PM (#18332908)
Yep, Wire is better even just because of this possibility, but even this project is interesting :)

https://briarproject.org/

Re:Technology preview: Sealed sender for Signal by hardwarescope on Tuesday October 30, 2018 @06:41AM (#18335287)
As a consequence of this choice, they store all of your unencrypted contacts (or unencrypted Wire contacts) on their servers. I don't think that's "additional privacy," compared to what Signal stores (nothing, it appears). Or it is at least not as simple a question as you make it seem.
Re:Technology preview: Sealed sender for Signal by walterbell on Tuesday October 30, 2018 @07:33AM (#18335522)
Would appreciate a reference on this, if you have one. I don't know about the general case, but none of my mobile contacts are shared with Wire's server and most of my Wire contacts have pseudonym handles/names.

If IETF efforts to standardize E2E messaging protocols can lead to interoperability between clients, we can reduce the influence of social network inertia on messenger client selection.