2020-08-12 UTC
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[tantek] private message << Use-case to be careful of when designing: Forwarding, in particular authenticating/verifying (and securing) both the forwarder and forwarding, but also transitively the senders and message(s) being forwarded. See https://chat.indieweb.org/social/2020-08-12/1597238678066600 for an example of how this is non-obvious and requires explicit design