Regarding the SGX enclave and contacting sharing, the blog post announcement dated 26 Sept 2017 says 'deploying into production...over the next few months'. Can we assume that's happened already? Or are contacts still being exchanged in a way that would allow a middle man to reconstruct an individual's social graph?
Given that it now takes an order of magnitude more time than it used to for newly added contacts to appear in my list of Signal contacts, I assume /something/ has changed with the way they exchange contact data.
