[[!comment format=mdwn
 username="https://anarc.at/openid/"
 nickname="anarcat"
 avatar="http://cdn.libravatar.org/avatar/b36dcf65657dd36128161355d8920a99503def9461c1bb212410980fe6f07125"
 subject="magic wormhole"
 date="2016-11-30T22:16:19Z"
 content="""
> What I'd really like to have is an interface that displays a
> one-time-use phrase of five to ten words, that can be read over the
> phone or across the room. Exchange phrases with a friend, and get
> your repositories securely linked together with tor.

I already mentionned the project in [[design/assistant/telehash/]],
but [magic-wormhole](https://github.com/warner/magic-wormhole) does
exactly that:

    % wormhole send README.md
    Sending 7924 byte file named 'README.md'
    On the other computer, please run: wormhole receive
    Wormhole code is: 7-crossover-clockwork
    
    Sending (<-10.0.1.43:58988)..
    100%|=========================| 7.92K/7.92K [00:00<00:00, 6.02MB/s]
    File sent.. waiting for confirmation
    Confirmation received. Transfer complete.

Receiver:

    % wormhole receive
    Enter receive wormhole code: 7-crossover-clockwork
    Receiving file (7924 bytes) into: README.md
    ok? (y/n): y
    Receiving (->tcp:10.0.1.43:58986)..
    100%|===========================| 7.92K/7.92K [00:00<00:00, 120KB/s]
    Received file written to README.md

While that example shows a file transfer, arbitrary data can be
transfered this way. There's a documented protocol, and it's not
completely peer-to-peer: there are relay servers to deal with NAT'd
machines. But the [PAKE
protocol](https://en.wikipedia.org/wiki/Password-authenticated_key_agreement)
(basically SPAKE2) could be a good inspiration here.

Otherwise, I must say that, as a user, I don't mind copy-pasting a
hidden service string (if that's what it's about): i can do that over
a secure medium (email + OpenPGP or IM + OTR) easily... But I
understand it can be difficult to do for new users.

"""]]