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Re:Show HN: Instant confirmation via Bitcoin payment protocol by nijiko on Monday June 16, 2014 @06:17PM (#7901797)
Yay, easy way to confirm false transactions :D
Re:Show HN: Instant confirmation via Bitcoin payment protocol by BrokenPipe on Monday June 16, 2014 @06:43PM (#7901908)
Not really, the payment protocol gives you back the full transaction that can be checked by the merchant.

The 'instant' comes from trusting a third party that temporarily controls enough keys to block the funds before they can get double spent but long enough that the tx can be confirmed.