credit-card

问题 I tried to check the validation of credit card using Luhn algorithm, which works as the following steps: Double every second digit from right to left. If doubling of a digit results in a two-digit number, add up the two digits to get a single-digit number. 2 * 2 = 4 2 * 2 = 4 4 * 2 = 8 1 * 2 = 2 6 * 2 = 12 (1 + 2 = 3) 5 * 2 = 10 (1 + 0 = 1) 8 * 2 = 16 (1 + 6 = 7) 4 * 2 = 8 Now add all single-digit numbers from Step 1. 4 + 4 + 8 + 2 + 3 + 1 + 7 + 8 = 37 Add all digits in the odd places from

问题 Often you can enter pages, which has disabled paste from Clipboard, like input password or Credit card numbers, which is very silly, because who keeps in memory complex passwords or CC numbers? People like to use password keepers for those things. I found that problem is in: ... b.bind("paste",function(){return!1} ... How to deal with it? How to unbind interception of paste method? 回答1: Came up with script - you need to open browser console and execute: $('*').each(function(){ var $this = $

问题 I have an input field on a webpage that contains a credit-card number. What is the best way of preventing the browser from caching this value? Any solution needs to work on a large selection of browsers. 回答1: Put attribute autocomplete="off" to your html form. E.g. <form name="form1" id="form1" method="post" autocomplete="off" action="http://www.example.com/form.cgi"> [...] </form> See this page. 回答2: <asp:TextBox Runat="server" ID="Textbox1" autocomplete="off"></asp:TextBox> 来源： https:/

问题 I was wondering how can I ask a user for credit card details and charge him without using Apple's in-app purchasing mechanism. My idea was to post the user's credit card to my online credit billing system and make the transaction on the website, behind the scenes, and then report back to the user with the transaction results. Will Apple approve this kind of app? 回答1: Apple will not approve such an app, unless users are purchasing something which cannot be purchased via an in-app purchase. For

问题 I was wondering how can I ask a user for credit card details and charge him without using Apple's in-app purchasing mechanism. My idea was to post the user's credit card to my online credit billing system and make the transaction on the website, behind the scenes, and then report back to the user with the transaction results. Will Apple approve this kind of app? 回答1: Apple will not approve such an app, unless users are purchasing something which cannot be purchased via an in-app purchase. For

问题 I'm wondering what's the best way of accepting payments from credit cards that require 3-D Secure verification. Currently the checkout flow is like this: Customer submits payment Payment gateway returns an error stating that the card requires 3-D secure code processing. Returns the ACS URL in the response I redirect user to the issuing bank's verification site and I pass a callback URL for the ACS to redirect after completion of verification Customer enters verification code and ACS redirects

问题 Various online services have different values for maximum year of expiry, when it comes to Credit Cards. For instance: Basecamp: +15 years (2025) Amazon: +20 years (2030) Paypal: +19 years (2029) What is the reasonable maximum here? Are there any official guidelines? 回答1: There is no official guideline as the credit card issuers can choose each when the cards they issue will expire. In fact they have been issuing cards for longer and longer periods of time. If you're trying to determine how

问题 Short question: Can I read credit card information with a NFC capable Windows Phone 8? Long question: How does NFC with credit cards exatly work? The card (or the phone with wallet function) receives a request via NFC and replies with the cleartext credit card information in some standardised format? The Wallet option then aditionally still props some comfirmation dialog before broadcasting the credit card information? Or is there some handshake encryption going on before hand? Or is there

问题 There is no documentation for card.io that I can find other than source comments. The CardIOCreditCardInfo.h file has an enum for CardIOCreditCardType. typedef NS_ENUM(NSInteger, CardIOCreditCardType) { /// Deprecated. /// @see CardIOCreditCardTypeUnrecognized, CardIOCreditCardTypeAmbiguous CardIOCreditCardTypeUnknown __attribute__((deprecated("Use CardIOCreditCardTypeUnrecognized or CardIOCreditCardTypeAmbiguous instead."))) = 0, /// The card number does not correspond to any recognizable

问题 There is no documentation for card.io that I can find other than source comments. The CardIOCreditCardInfo.h file has an enum for CardIOCreditCardType. typedef NS_ENUM(NSInteger, CardIOCreditCardType) { /// Deprecated. /// @see CardIOCreditCardTypeUnrecognized, CardIOCreditCardTypeAmbiguous CardIOCreditCardTypeUnknown __attribute__((deprecated("Use CardIOCreditCardTypeUnrecognized or CardIOCreditCardTypeAmbiguous instead."))) = 0, /// The card number does not correspond to any recognizable