I disagree that electronic trust is a solved problem. It is mathematically solved, yes, but the reason that it isn't widely used is because it's still intrusive and painful to do. A solution that isn't acceptable to the masses isn't an effective solution.
If it could be done in a way that is invisible (like HTTPS, for instance), then it would be ubiquitous. That's the part of the problem space that still needs resolution.
I disagree that electronic trust is a solved problem. It is mathematically solved, yes, but the reason that it isn't widely used is because it's still intrusive and painful to do. A solution that isn't acceptable to the masses isn't an effective solution.
If it could be done in a way that is invisible (like HTTPS, for instance), then it would be ubiquitous. That's the part of the problem space that still needs resolution.