I think it is fair to expect Signal to support a solid encrypted backup/sync mechanism. They can allow users to manage the encryption keys out of band. Users ca

I think it is fair to expect Signal to support a solid encrypted backup/sync mechanism. They can allow users to manage the encryption keys out of band. Users can use a password manager (or a piece of paper) to save the encryption key. Anyone who is security/privacy conscious to use Signal is also using a solid password manager and not reusing passwords as well as following good secure data backup practice, I hope.