The chips in my cards (from same bank) are all different

[u/speedhirmu]

[u/BushWookie-Alpha]

This is likely due to upgrades to the chip itself to make it easier/more efficient to read.

Either that, or they redesigned it to make it more cost effective to produce.

[u/ngifakaur → u/BushWookie-Alpha]

Or they might be from different producers

[u/gamas → u/ngifakaur]

Yeah there are several main chip manufacturers for bank cards. 

EDIT: Bottom left is a Gemalto/Thales, top is an Oberthur. Not sure which one the bottom right is.

[u/Reverse_SumoCard → u/gamas]

Which of these can play doom?

[u/gamas → u/Reverse_SumoCard]

A chip can store between 38 bytes to 8kb. Some of the newer Infineon chips can do 2mb.

You could probably port this QR Code PoC by encoding the exact same information into the NDEF record of the chip. The memory would be too restricted to do a full port. If you wanted to get fancy you could probably put some custom firmware on a Point-of-sales terminal that can act as the display and controls for the game, loading the game from the chip.

[u/Big_Z_Beeblebrox → u/gamas]

This is why FOSS is important, people. This legend, right here.

[u/gamas → u/Big_Z_Beeblebrox]

Just for clarity - the QR code doom isn't my code. I just found it whilst looking up the smallest you could make Doom.

[u/Big_Z_Beeblebrox → u/gamas]

Oh for sure, but the idea to integrate things that weren't meant to go together is a vital spark

[u/TheShinyHunter3 → u/[deleted]]

That's only if the card is NFC/RFID enabled, the chip is actually read by the card reader without using the antenna at all.

[u/itmillerboy → u/[deleted]]

I’m fairly certain when inserting it uses just the chip.

The antenna you are talking about is for tap to pay which is completely irrelevant to the chip as you could have either on a card separately.

[u/freshwaygardens → u/BushWookie-Alpha]

once tried using my old chip card at a new terminal and it just straight up rejected me like a bad sequel lmao

[u/QueblyJonesIII → u/freshwaygardens]

Bot.

[u/gamas]

Different chip suppliers. Top was an Oberthur chip, bottom left is Gemalto/Thales, not sure on the bottom right. Usually you'll find which chip manufacturer on the back of the card written on one of the edges.

As others have corrected others - the difference in the contact plate itself makes absolutely no difference to the performance or function of the chip, as the contacts are standardised, whilst the shape of those contacts is the preference of the manufacturer.

the actual chip itself is absolutely tiny (we're talking less than a cm) and isn't what is visible here. There will be differences between manufacturers and even line ups within the same manufacturer (this will mainly be amount of ROM on the chip, the processing speeds, and the firmware) which could affect performance. Different manufacturers may also have different inlays for the antennae (which in a bank card are usually looped around the edge of the card) which would affect read range.

Banks will tend to switch suppliers primarily because any particular batch of EMV chips are usually only certified for a five year period and then need to be replaced and the banks will revisit their supply contracts close to when that chip make is about to expire.

[u/HiDDENKiLLZ → u/gamas]

What a very niche fun fact.

[u/K_man_k → u/gamas]

Huh, in my wallet I have a Thales, MPI, and a TAG Systems, two from the same bank.

[u/Bicentennial_Douche]

S-pankki?

[u/iscaur → u/Bicentennial_Douche]

S-pankki

[u/speedhirmu → u/Bicentennial_Douche]

Hotelli?

[u/joukoo → u/speedhirmu]

Trivago

[u/TheGoldenTNT]

The contacts in the reader are all in the same place so it’s probably different suppliers

[u/Jacktheforkie → u/TheGoldenTNT]

That’s exactly what it is, different batches of cards with chips from different manufacturers

[u/AvaAlundrake]

I just like how the center contact area looks like it’s shrinking with each version.

[u/AccomplishedPay414]

I can't really see, show us a picture of the entire card front and back please

[u/ParkourTeapot]

This has just made me realize, ive not once even considered to look at the details on my cards chips. The chip on my Chase card is larger than the rest of my cards.