NFD » NFD-android

NFD prefix propagation feature requires a signing certificate to be present in NFD's key chain (see Let the World Reach Your NFD "Where's the Key Chain?" section).
This is trivial on a source code installation in Ubuntu or macOS where NFD and apps use the same key chain of the current user, problematic on Ubuntu PPA installation where sudo is needed to write into NFD's key chain, and very difficult on Android where every app is isolated.
If a certificate is obtained and owned by an app, there is no way to expose it to NFD, and thus prefix propagation does not work.
Resolution of this problem requires protocol changes in separate issues.