Payment puzzle · Set the bits · Medium

Can you set the TVR bits that record what the terminal found?

Set the flags a terminal would raise, round after round. Free, no sign-up.

TERMINAL 0042 · CHIPROUND 1

What the terminal found:

  • The card’s PIN try counter was already at zero, and no other verification method was allowed.
  • The card number is on the terminal’s exception file.
  • The issuer’s answer (the ARPC) didn’t verify on the card.

TVR · tag 95

00B100B200B300B400B5

Your TVR: 00 00 00 00 00

Each round tells you what a terminal found during a chip payment. Set exactly the TVR (tag 95) bits that record it: no more, no fewer.

Byte 1Authentication
Byte 2Application
Byte 3Cardholder verification
Byte 4Risk management
Byte 5Issuer
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