As the focus is moving away from trust in online transactions the new focus is on social networks. Are you who you say you are? When it comes to matters of identity it is hard to beat Lewis Carol.

'Who are you?' said the Caterpillar.
This was not an encouraging opening for a conversation. Alice replied, rather shyly, 'I - I hardly know, sir, just at present - at least I know who I was when I got up this morning, but I think I must have been changed several times since then.'
—"Alice's Adventures in Wonderland", Lewis Carroll.

Then of course there was the clarity of the 60's. Remember Woodstock and this great piece that has played through thousands of conversations with caterpillars.