Japan facing credit card number shortage
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Japan facing credit card number shortage
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Re: Japan facing credit card number shortage
#2>the company decided to take makeshift measures such as reusing credit card numbers of discontinued cards after a certain period had passed since cardholders canceled their memberships. However, there are considerable risks of fraudulent usage
What are the risks here, and why aren't they already present by someone generating credit card numbers with a RNG? AFAIK credit card transactions are authenticated by at least expiration date and cvv, so there isn't a risk of reusing credit card numbers.
>and a source close to the credit card industry said, "Increasing the number of digits is the only real way to deal with the problem. There will likely be a shift toward increasing the number of digits in the first half of this decade."
ipv6 deployment all over again
Re: Japan facing credit card number shortage
#3>the company decided to take makeshift measures such as reusing credit card numbers of discontinued cards after a certain period had passed since cardholders canceled their memberships. However, there are considerable risks of fraudulent usage What are the risks here, and why aren't they already present by someone generating credit card numbers with a RNG? AFAIK credit card transactions are authenticated by at least…
What if they switched CC numbers TO IPV6 addresses? Insane or genius?
Re: Japan facing credit card number shortage
#4Can Japan not obtain another country code from Visa/Mastercard (part of the first 6 digits)?
Re: Japan facing credit card number shortage
#5>the company decided to take makeshift measures such as reusing credit card numbers of discontinued cards after a certain period had passed since cardholders canceled their memberships. However, there are considerable risks of fraudulent usage What are the risks here, and why aren't they already present by someone generating credit card numbers with a RNG? AFAIK credit card transactions are authenticated by at least…
What if they switched CC numbers TO IPV6 addresses? Insane or genius?
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Re: Japan facing credit card number shortage
#6Assuming the last digit is a checksum and the first six are taken by the routing information, that leaves them 9 digits or a billion possible numbers per credit card issuer. Japan has a population of about 125 million. Are Japanese people cycling their numbers so frequently? Or are they big on ephemeral card numbers?
Is it not possible for an issuer to get a second prefix if they run out of digits?
I also wonder if credit card numbers aren't living on borrowed time anyway. Instead of adding more digits it might make sense to remove the digits entirely and only allow token based transactions. This does assume we figure out a way to do online purchases not using the digits.
Re: Japan facing credit card number shortage
#7Re: Japan facing credit card number shortage
#8Assuming the last digit is a checksum and the first six are taken by the routing information, that leaves them 9 digits or a billion possible numbers per credit card issuer. Japan has a population of about 125 million. Are Japanese people cycling their numbers so frequently? Or are they big on ephemeral card numbers? Is it not possible for an issuer to get a second prefix if they run out of digits? I also wonder if c…
Cards can have nfc, and most people already have nfc readers in the form of phones. I think this is the easiest way to support cryptographic payments.
Re: Japan facing credit card number shortage
#9Assuming the last digit is a checksum and the first six are taken by the routing information, that leaves them 9 digits or a billion possible numbers per credit card issuer. Japan has a population of about 125 million. Are Japanese people cycling their numbers so frequently? Or are they big on ephemeral card numbers? Is it not possible for an issuer to get a second prefix if they run out of digits? I also wonder if c…
https://en.wikipedia.org/wiki/Luhn_algorithm describes the way the check digit is calculated.
Re: Japan facing credit card number shortage
#10Assuming the last digit is a checksum and the first six are taken by the routing information, that leaves them 9 digits or a billion possible numbers per credit card issuer. Japan has a population of about 125 million. Are Japanese people cycling their numbers so frequently? Or are they big on ephemeral card numbers? Is it not possible for an issuer to get a second prefix if they run out of digits? I also wonder if c…
Cards can have nfc, and most people already have nfc readers in the form of phones. I think this is the easiest way to support cryptographic payments.
I’m honestly surprised the move to contactless hasn’t occurred faster, as the costs for hardware seem lower for nfc versus chip.