Sigma_Orionis wrote:Well good thing you nipped it at the bud.
And I doubt very much someone entered the wrong number, why? in the back of your card there are three numbers, they are known as CVV2 or CVC2 they are part of a larger code that is generated at the same time as your credit card number (and the only one that is supposed to know the whole code is the bank. If someone had entered your credit card number by mistake and THEIR CVV2 it would not match and the transaction would have been declined. I doubt very much that someone would have entered it BOTH by mistake.
code monkey wrote:thanks for taking the air out of that balloon. i was having a hard enough time with the improbability of a typo or 2 yielding a number that would pass hashing. on the other hand, i'm not always asked for those 3 digits. a modest thief?
code monkey wrote:Sigma_Orionis wrote:Well good thing you nipped it at the bud.
And I doubt very much someone entered the wrong number, why? in the back of your card there are three numbers, they are known as CVV2 or CVC2 they are part of a larger code that is generated at the same time as your credit card number (and the only one that is supposed to know the whole code is the bank. If someone had entered your credit card number by mistake and THEIR CVV2 it would not match and the transaction would have been declined. I doubt very much that someone would have entered it BOTH by mistake.
thanks for taking the air out of that balloon. i was having a hard enough time with the improbability of a typo or 2 yielding a number that would pass hashing. on the other hand, i'm not always asked for those 3 digits. a modest thief?
Sigma_Orionis wrote:I am pretty impressed Mr Mono, you're aware of the "Luhn Mod 10" Algorithm very good
Sigma_Orionis wrote:As for the three digits thing, it depends. if you're going to make a transaction IN PERSON, they obviously won't ask for that code because usually the merchant will type it his/herself in the POS (Point of Sale) Card Reader that will validate your credit card.
SciFi Chick wrote:Sigma_Orionis wrote:As for the three digits thing, it depends. if you're going to make a transaction IN PERSON, they obviously won't ask for that code because usually the merchant will type it his/herself in the POS (Point of Sale) Card Reader that will validate your credit card.
I never needed those three numbers when running cards on my POS reader at the restaurant. Also, here in the U.S., a lot of places don't even require your signature or any I.D. Kind of scary when you think about it.
code monkey wrote:Sigma_Orionis wrote:Well good thing you nipped it at the bud.
And I doubt very much someone entered the wrong number, why? in the back of your card there are three numbers, they are known as CVV2 or CVC2 they are part of a larger code that is generated at the same time as your credit card number (and the only one that is supposed to know the whole code is the bank. If someone had entered your credit card number by mistake and THEIR CVV2 it would not match and the transaction would have been declined. I doubt very much that someone would have entered it BOTH by mistake.
thanks for taking the air out of that balloon. i was having a hard enough time with the improbability of a typo or 2 yielding a number that would pass hashing. on the other hand, i'm not always asked for those 3 digits. a modest thief?
SciFi Chick wrote:Sigma_Orionis wrote:As for the three digits thing, it depends. if you're going to make a transaction IN PERSON, they obviously won't ask for that code because usually the merchant will type it his/herself in the POS (Point of Sale) Card Reader that will validate your credit card.
I never needed those three numbers when running cards on my POS reader at the restaurant. Also, here in the U.S., a lot of places don't even require your signature or any I.D. Kind of scary when you think about it.
Rommie wrote:
I seriously don't understand why the US credit cards don't have chip and PIN yet- I'm sure it's pricey to make the switch, but fraud went down nearly 50% in some areas of Europe when it was introduced, so surely they save more money in the long run.
The fact that you can do Pay Wave in many US areas for example- just have a card in your hand and automatically have money deduct, with no one checking it- scares the hell out of me because no reason someone can't just steal your card and use it. Only place I've ever seen that work in Europe was at a music festival for pre-paid cards.
Swift wrote:The odds that someone could randomly come up with a number (either accidently or intentionally) that was someone's actual credit card number are extremely low. It is a 16 digit number, so we are talking 10^16 combinations (a little less, some of course will be nonsense, like 0000 0000 0000 0000). Even given the first four are the type of credit card, that still leaves 10^12 for each card type. And even without the CVC, you still have to match the expiration date.
code monkey wrote:it's just that i'd prefer not to think that that nice waiter/waitress was a thief.
geonuc wrote:code monkey wrote:it's just that i'd prefer not to think that that nice waiter/waitress was a thief.
And they may not be. Restaurant systems are apparently very easy to hack, which is why I've taking to paying cash at restaurants.
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