payment

问题 I am working on an NFC-based payment device. I am using MIFARE DESFire EV1 chip. My question is: How to enable a full EMV compliant payment transaction with this chip hardware? I found this Visa Ring which does payment transactions. It uses NFC Ring® design of McLear & Co with NTAG IC. 回答1: How to enable a EMV payment transaction with MIFARE DESFire EV1? Simple answer: You can't. MIFARE DESFire is a proprieatry contactless smartcard system that implements a filesystem for data storage and an

问题 You walk into a store, select several products, then go to the counter to pay your bill. The total is some amount ( A ). You reach into your wallet, purse, or pocket and put down some cash ( P ), where P >= A , and the cashier gives you change. Given the set of coins and bills that are in circulation, what are the most likely values for P ? Some examples, assuming that the available bills are $5, $10, $20, $50 and $100, and the available coins are 5c, 10c and 25c: A = $151.24 P[1] = $160 (8x

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I'm looking for a payment gateway company so we can avoid tiresome PCI-DSS certification and its associated expenses. I'll get this out the way now, I don't want Paypal. It does what I want but it's really not a company I want to trust with any sort of money. It needs to support the following flow: User performs

问题 I have an HTML form where people can make payments on my sites. Instead of using SSL, I'm wondering whether I could use a JS lib that would encrypt the credit card information and send it to the server in clear text but encrypted, than the server would decrypt it. I found several libs that do that, they basically ask for a key pair from the server, encrypt it and send it to the server encrypted. Those are the ones I found: http://www.jcryption.org/ http://www.hanewin.net/encrypt/ http://www

问题 Can I make payment with paypal details using paypal id and password without redirecting to paypal site? I want to do all payment process without leaving my website. Thanks 回答1: You can by using PayFlow but the point of redirecting to paypal is to make sure the payment is secure, not doing so might put your customers off and you'll have to focus time on locking down your payment page. Payflow overview Full payflow developer guide. 来源： https://stackoverflow.com/questions/15494439/pay-with

问题 I know how NFC works, but how does it store money and transfer money? Is it connected to the user's bank account? If so how does that mechanism work in terms of the infrastructure? A detailed explanation would be appreciated. Thanks 回答1: NFC payment works just as any normal contactless card payment. Every card (even the "virtual" one you are using when paying with NFC) has an account it is bound to. It could be your debit account, or it could be an anonymous account used with an prepaid card.

问题 I have heard that .NET is not free and that I have to pay Microsoft if I develop a .NET application. Is this true? If so: What do I have to pay? I'm a subscriber to the MSDN via the Academic Alliance (we download a variety of Microsoft Software products for free, like VS2008 and Windows Server 2008). Do I have to pay for the software that I make with these tools? What about web apps with ASP.NET? Is there a payment due when I host my application or do I just pay for the technology? EDIT: So

问题 I need to represent the payment of a customer to buy a flight ticket in an airport. The system of airport has a bonus system. So customer can make payment for ticket by a bonus or by another payment system or together. But I don't know how to represent it all together. I wanna make the interface that called PaymentMethod and make this hierarchy : ByPaymentSystem (Interface), ByBonuse (Class), ByMix (Class that dependet from ByPaymentSystem ) Payment system will also have many realizations f.e

问题 Is it possible in stripe payment, First we will validate credit card using stripe, then we generate token and create customers. we will save token instead of credit card information in database and later we will make payments from customers on basis of token or customer instead of credit card information. In javscript file how do we handle stripeResponseHandler and function stripeResponseHandler(status, response) ? because we have already generate token using Stripe.createToken({ number:

问题 I have selected application ( A0000000032010 ) on Visa contactless card and when I issue GPO command: "80A8000002830000" I get error: 67 00 Does anyone have idea what can be causing this? 回答1: You receive that error code because you are sending an invalid GET PROCESSING OPTIONS command. In response to the application selection, you received the following PDOL: 9F38 0E (Processing Options Data Object List (PDOL)) 9F6604 (Terminal Transaction Qualifiers (TTQ)) 9F0206 (Amount, Authorized