SSH succeeded because it removed bureaucracy: users not developers know who they trust, with what, and why: https://tools.ietf.org/html/draft-iab-protocol-success-04#appendix-A.3 …
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suppose it should be said, the problem with payment protocol to obtain one-use bitcoin addr is it has to have online keys & is more complex.
@adam3us Complexity is all the more reason to leave up to the users. You and I and any other designer don't know what we're doing.
