[Cryptography] Cryptography buzzword spotted in mundane life, and I don't know what it means

[Kent Borg]

I just bought groceries at a Bristol Farms store, in Pasadena. I paid 
with a credit card chip transaction.

And I noticed something on the receipt I've never seen before, near the 
bottom is this stuff:

    ACCT: AMERICAN EXPRESS 151.14
    (timestamp with some extra digits and spaces off the end)
    AID: A000000… (ending in a good number of non-zero digits I'm too
    lazy to try to copy)
    TVR: 0800008000
    TSI: E800
    TRANSACTION TYPE: 00
    APPLICATION ISSUER DATA: (13 hex digits)
    APPLICATION CRYPTOGRAM: (14 hex digits)
    CVM: 5E0300
    POS Entry Mode: 05
    Host Return Code 000

The "application cryptogram" is what caught my eye…a message from credit 
card chip, its answer to some challenge?


-kb, the Kent who was part of the big "Shopify 20% Off!" layoff event 
this week, and so could use a job, BTW.
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