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penegui / MITM-PixNFCView on GitHub
Technical article shows how a MITM attack against Pix tap-to-pay can swap the dynamic QR during APDU exchanges (UPDATE BINARY), silently redirecting payments without breaking crypto. We detail the flow, a PoC with NFCGate, CRC recalculation, and defenses: per-transaction signature, nonce, timestamp, counter, and strict AID/offset checks.
☆14Oct 18, 2025Updated last year

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