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#blockchain payments

JCOP4 Java Card chip generating P-256 keypair for EMV blockchain payments
Engineering Culture

I Tapped a Java Card into Blockchain Payments—Here's the Magic

Tap a card. Blockchain settles. A tiny Java Card applet just fused EMV payments with crypto, powering real-world taps in Sydney cafes.

3 min read 2 hours ago
Cafe merchant checking instant stablecoin payment on phone after card tap, contrasting Visa delay clock
AI Dev Tools

Stablecoin Settlement Turns Visa's 2-3 Day Drag into Seconds – For Sydney Cafes, At Least

That coffee shop owner in Sydney? She's staring at her phone as your $5 latte payment hits her account in seconds. No more Visa limbo, no holds, no weekends killing cash flow.

4 min read 3 hours ago
Contactless card tapped on coffee shop terminal, showing full payment flow to cafe
AI Dev Tools

Your $5 Coffee Tap: 80 Cents to Banks, OpenPasskey's Full-Payment Fix

Tap for coffee. Banks feast. A Sydney startup's card says no more. Full $5 to the cafe, instantly.

3 min read 3 hours ago
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