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Smart vending machine integration: Encryption questions

Hi -

Question summary: I'm confused about how encryption / decryption is handled from card readers.

 

Background:

Assume I'm building a very low cost, smart vending machine. When deployed, it will operate as a card-present, unattended terminal.  The machine will have in it:

  • OEM card reader from Magtek, connected via USB to...:
  • A tiny board with a CPU / RAM running embedded Linux, running a custom little Python application which...:
  • Talks over a wireless data connection to the Internet.

The Magtek reader will be injected with an encryption key during manufacture, which will encrypt the card data at the reader head. Magtek tells me that this key comes from the credit card gateway provider, and that the vending machine passes the encrypted data directly (encrypted) to the gateway, which decrypts & authorizes.  (This is to avoid the possibility that a bad-guy inserts a USB device in-line in order to capture credit card swipe info.)

 

I'm working on the assumption that I'm using the Authorize.Net AIM method to conduct transactions.

 

Two things are not clear to me:

  1. What key to provide to Magtek to insert.  I thought it might be the transaction key; but this doesn't make complete sense to me, mostly because I'm unfamiliar doing direct work down at this card swipe level.
  2. If I were to use an SDK, I wouldn't know what information to put into the various fields.  All I will receive from the swipe is "track 1, track 2"... contents - encrypted.

Can anybody straighten me out?

 

Thanks in advance.

jayb
Member
19 REPLIES 19

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Robin (Askmeoffers)

reader head. Magtek tells me that this key comes from the credit card gateway provider, and that the vending machine passes the encrypted data directly (encrypted) to the gateway, which decrypts & authorizes. wmlink/2sv

Hi -

Question summary: I'm confused about how encryption / decryption is handled from card readers.

 

Background:

Assume I'm building a very low cost, smart vending machine. When deployed, it will operate as a card-present, unattended terminal.  The machine will have in it:   wmlink/2step

Modern and smart vending machines can now work with paywave system where the user can just wave his atm card over it and the payment will be done. In regards to the securtiy of this proccess, i heard there was something about encrypted payment gateway kind of something.

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This means in turn that Authorize.net has to be able to take the encrypted data, along with some key that's set using a totally separate process and stored internally on their end, and decrypt it. 

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Contact the card issuer at the number on the back of your credit card to validate the name, phone number, and billing address on file. If there are problem when shopping, contact with the brand, Walmart, Costco and DICK'S Sporting Goods will fix inmediately. 

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natasha47
Member