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Re:Ask HN: Why are credit card chip readers so slow? by crote on Monday June 26, 2017 @01:01PM (#14638322)
Your link gives a 403, could you re-upload it somewhere else?
Re:Ask HN: Why are credit card chip readers so slow? by germanier on Monday June 26, 2017 @01:26PM (#14638611)
I made a screenshot of the most interesting example: http://imgur.com/ye5MJcH This is what they print out for the international schemes. On the left is what the customer gets (sometimes directly on the receipt, sometimes on an extra piece of paper), the right one is for the merchant (some only save it electronically now). Some terminals show less info but much of it is almost always present, something which I haven't seen much internationally in that level of detail.
Re:Ask HN: Why are credit card chip readers so slow? by pilkington on Friday June 30, 2017 @08:35PM (#14674519)
You can decipher some of the fields printed on the receipt using https://tvr-decoder.appspot.com. The acronyms are from the EMV specs (https://www.emvco.com/specifications.aspx?id=223, probably book 3)

Eg. TVR: 0000008000 (Byte 4 Bit 8) Transaction exceeds floor limit

Floor limit being the $/EUR/whatever amount that could be approved offline.

The 2 in the diagram appears to be pointing at a cleartext credit card number.