Signal does not solve the meta data problem either. Discovery is an open problem [0]. Signal messages leak the recipient, which is the most important meta data.

Signal does not solve the meta data problem either. Discovery is an open problem [0]. Signal messages leak the recipient, which is the most important meta data. You would have to use Tor/Onion routing, which is inefficient. [0] https://whispersystems.org/blog/contact-discovery/ https://whispersystems.org/blog/contact-discovery/