Collaborate Disseminate
I need to use the CVK Key (in key block format) to calculate the CVV2.
In the past, I have always used single keys in variant format for this purpose (CVKa + CVKb), and the calculation procedure is standard (there are also many online calc… Continue reading CVV2 calculation with TR-31 Key
While making a payment for a Google service, I noticed that clicking the Verify button (in the screenshot below) would not move to the next screen.
Curious, I opened up the developer console and noticed two calls to https://224.32.32.221/… Continue reading Why would Google Pay try to fetch data from an IP address over SSL? [closed]
I use a Thales PayShield 10K with a LMK KeyBlock 3DES. I have to send a CVK Key to a Scheme for the valorization of CVV2 value. Now, in my envorinment i generated a CVK Key with "Key Usage"= C0 and encrypted it under a ZMK (Key s… Continue reading Management of CVK key in Key Block format
I’m selling some stuff on Facebook marketplace, and I always get a bunch of this kind of response, usually within a few moments of the post:
Person: Is this still available?
Me: Yes
Person: Where are you located?
Me: {my location}
Person:… Continue reading What is this marketplace scam? [closed]
This question asked if websites on which one is transacting have their payment information and from the replies it seems that they do (or at least their payment gateway service providers do). But my question is if a website (Twitter, speci… Continue reading Can Twitter use the payment information they have to know if multiple users have used the same credit card to buy multiple Twitter blue subscriptions?
I have observed that in some payment portals while making payments via credit/debit card the CVV/CVC number is masked out (hidden), but in different portals this is not the case.
For example: USA & a few of UK based payment portals are… Continue reading Inconsistency in masking CVV/CVC credit card details during input
What information about a cardholder does a payment receiver get when paid with credit card via direct transfer. Examples: Spotify, Netflix, etc… How’s all buying digital goods process released?
When you swipe/insert your card at a payment terminal, what information does the vendor receive?
For example:
Card number
CCV
Expiration
First and last name
Any individual identifiers?
Does Apple Pay or newer payment technologies change … Continue reading Information exposure during a credit card / NFC transaction
I’m building an app that uses Braintree for processing payments. According to the documentation, I need a server-side endpoint that returns the clientToken, which is then used to manage a user’s vault and process payments, so I’m trying to… Continue reading Is braintree clientToken supposed to be public?
I’ve heard it time and time again being repeated: "You should get one of those RFID-shielding wallets to protect your tap-enabled cards from thieves."
I know that thanks to the security measures built into the card they can’t cop… Continue reading Are thieves with wireless payment terminals really a threat? [duplicate]