Payment cards. For questions about storing credit card numbers, see also pci-dss. For questions involving the physical object, see also smartcard (if the card has a chip).

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0
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0answers
37 views

Hash function for credit card [duplicate]

Hey PCI and hash expert, What hash function is good for hashing credit card and providing collision resistance? Some context: We are building a tokenization service, so each credit card will have ...
4
votes
1answer
82 views

Credit card tokenization algorithm

Just curious, what is the common algorithm used to tokenize a user's credit card? I know lots service use PRNG (random number). Does it just re-gen a random number when there is a confliction? What ...
0
votes
4answers
149 views

Is it safe to tell credit card number to bank employee over a phone?

Recently, I got a new credit card via post. To activate it, it is required to call to the bank (phone number is attached to the card) and confirm, that card was received. For activation purposes, the ...
3
votes
2answers
75 views

How to manually disable the no contact card?

New payment cards in my country are now delivered with the no-contact option that allows pay without putting the card in a machine. The fact is that these cards aren't secured because you can read ...
8
votes
4answers
780 views

When paying for something on line, is paying with a checking account less risky than paying with a credit card?

If I purchase something on line and am given the choice to pay with a checking account (also known as a current account) or a credit card, is the risk of my checking account data being stolen and used ...
3
votes
0answers
79 views

Clone debit or credit card

I would like to make some workshop about Debit or Credit card fraud (Skimming). So I need as much as possible information about it. Is it possible to clone debit or credit card with MagStripe reader ...
2
votes
1answer
64 views

How to not store the card during 3D Secure authentication, to be PCI DSS compliant?

I'm implementing a payment solution where the cardholder enters his card details on our own website. We need to use 3D Secure for extra authentication of the cardholder. Our payment gateway ...
0
votes
2answers
159 views

If I browse a website over HTTPS using a VPN, can the data be sniffed somehow?

I bought yesterday a flight from an American website. In my country, tickets are too expensive. Therefore, I used a IPVanish VPN to browse the airline website. It appears as if I visited it from New ...
1
vote
2answers
54 views

How is generating payment Tokens secure in Mobile development?

I'm using Stripe for in app payments in my mobile app project and I don't quite understand how any app is secure if the user inputs there card info (with or without stripe) if it's not over HTTPS the ...
1
vote
2answers
68 views

How does Stripe Checkout prevent phishing attacks?

The Stripe Checkout overlay (https://stripe.com/checkout) pops up within a site and does not show the associated URL. A malicious website could create its own overlay that looks like Stripe's, and ...
2
votes
2answers
72 views

EMV as authentication technology and not a data security technology

I'm trying to wrap my head around what I view as EMV chip card security loopholes. Here's what I'm told about EMV. If a transaction is being recorded maliciously by a third party, they will get your ...
52
votes
6answers
6k views

Has a benefit been demonstrated for credit card machines asking for ZIP code?

In the U.S., many credit card machines at places like gas stations have started asking for your ZIP (postal) code to use a credit card ostensibly to help verify that you really are the cardholder, ...
3
votes
2answers
91 views

Does Visa Checkout have preventive measures against spoofing?

A few online merchants are offering special deals for using Visa Checkout, a payment service similar to PayPal, so I've been trying to learn something about it before signing up. When you are on a ...
1
vote
2answers
38 views

Is it PCI-compliant/kosher to send a credit card number to a 3rd party sever from a mobile client?

I am building a mobile app, and part of the the functionality of the app is to place an order with a 3rd party. The 3rd party server accepts a credit card number string. Can I build a mobile client to ...
0
votes
2answers
53 views

Comprimising or affecting card readers, billing systems, or POS terminals using a malicious card

Our company got a new card printer for employee IDs. It was a bit expensive and we had to undergo a background as it allowed us to print both mag strips and EMV chips. I don't understand enough about ...
4
votes
3answers
299 views

Storing credit card information for later manual processing

I am rebuilding a clients eCommerce site using Wordpress and WooCommerce as the framework. Their current eCommerce site takes the credit card information and stores it for later manual processing. To ...
2
votes
2answers
118 views

How does a debit/credit card reader verify the PIN so quickly?

I understand that the associated PIN for a given card is not stored on the card itself in any way. So I am wondering then, when I use my cards how does it seem to be able to verify the PIN quite ...
0
votes
3answers
116 views

Why is using the chip in chip-cards required at manned points of sale?

Chip cards are more secure because they prevent cloning. Chip cards also have the magstripe for backward compatibility. In my recent experience at supermarkets in California, using the chip takes a ...
2
votes
0answers
51 views

Add a supplementary credit transaction to improve online payment security?

An online company from which I regularly buy goods apparently recently upgraded their security policy. Let's say I bought something for 73,31€. As usual this company uses 3D-Secure for the checkout ...
4
votes
1answer
70 views

Is it ok from the viewpoint of PCI DSS to send credit card info to my own server which then directly sends it to PayPal?

Currently I'm developing an iOS application which has an option to pay an order (clothes cleaning) via scanning credit card info using device camera. I can't use Apple In-App Purchases (IAP) for this, ...
5
votes
3answers
154 views

My client needs credit card details emailed to them, will an encrypted file work?

I have a new client who is a reseller for vacation packages. They have multiple wholesalers, and my client is instructed by the wholesalers to sign into their wholesale account, and enter their ...
2
votes
2answers
131 views

Selfie as form of authentication for credit card transactions

I read in a news snippet on various sites (cnn for one), that one of the large credit card companies wants to implement some sort of authentication whereby credit card transactions are authenticated ...
3
votes
3answers
161 views

Credit card processing in mobile app over Stripe - PCI DSS compiant?

after reading a lot of PCI DSS stuff I'm still not sure whether it would be ok for us to use the following process in our app: Get full credit card data from attached card reader Tokenize it using ...
-1
votes
1answer
57 views

Magnetic stripe credit card [duplicate]

Do ATM in London accept magnetic stripe? If yes can a thief still duplicate a credit card and use it in an ATM which accepts magnetic stripes?
3
votes
1answer
52 views

concern about including credit card form in iframe using dynamically generated url

I'm looking at including a credit card form in a page via iFrame but the form app needs parameters passed from the AngularJS app in the parent page in order to complete the transaction. My concern is ...
1
vote
5answers
153 views

What steps should I take before using my credit card to buy something online?

I am a private computer user with an internet connection. Assuming that my connection is a standard land line (that I legally own, I'm not free loading) and that my computer is up to date on operating ...
1
vote
3answers
590 views

EMV credit card cloning: PIN code known by a malicious person

Could a credit card cloned (chip or magnetic band) if someone has it for a few seconds and knows the PIN code? If the PIN code is changed, can the cloned card still be used?
4
votes
2answers
219 views

Reading magnetic stripe on a credit/debit card with an EMV chip

Is there any way of knowing is a credit/debit card has an EMV Chip, by reading the magnetic stripe. This way I could deny the payment via magnetic stripe and ask to the customer to insert the card via ...
2
votes
3answers
3k views

Is it safe to auto-fill credit card numbers using Chrome?

Is it safe to auto fill credit card numbers using Chrome? Does it safely store the credit card information? As far as my understanding goes, it just shows asterisk values but on click it reveals the ...
6
votes
5answers
159 views

Can I show Credit Card Data to final customers and be PCI Compliant?

I work with reservation management syatems. In the hospitality industry there is the concept of credit card as guarantee. By it when making any kind of reservation you are asked for your credit card ...
1
vote
1answer
236 views

Is zinc.io PCI compliant (/does it need to be)?

zinc.io provides shopping API to programmatically purchase items on Amazon, Best Buy, and Walmart to name a few. A brief observation of its API tells us credit card information is definitely being ...
3
votes
2answers
554 views

Can expired credit card information be used for fraud?

I have encountered a situation where payment card (debit/credit) information, including name, number, expiration date, and cvc, is being saved by an organization unencrypted in excel spreadsheets on ...
2
votes
2answers
493 views

Is it secure to SMS your Credit card info (or other info) to someone else?

I am buying some products and have mostly communicated with the store via email. I am planning on paying by credit card, but the store doesn't have online billing. Normally, I would just phone the ...
0
votes
1answer
196 views

Is PCI SAQ A or A-EP applicable for my use case?

I read the FAQ over here andI feel that we do not need to be PCI Compliance but I have read many other posts, articles etc which seem to contradict my assumption. So I was wondering if any of you guys ...
2
votes
3answers
471 views

How can my bank issue a new credit card with the same pin number? [duplicate]

I live in France, and I have a debit card issued by my bank. When it expires, I receive a new one with the same pin number. I recently asked my banker to issue another card (a different one, for ...
3
votes
1answer
202 views

Deleting credit card information after every transaction

There have been many reports of hackers compromising credit card information in the databases of online shopping websites. Will deleting my credit card information from my account after every ...
1
vote
0answers
30 views

Non-trad bus model: I pay suppliers directly with client CC info. Need to be able to securely collect and read info [closed]

I'm a home-based travel agent. It is against my contract with my host agency (and I think the law actually) to directly accept payment from clients. Instead, we use customer CC information to pay ...
1
vote
0answers
96 views

ASP.NET WCF security, javascript and handling sensitive information

I've come upon what I would call some "nasty" javascript coding (I come from a KnockoutJS / Angular / Web API 'world') in which WCF services are exposed to javascript by production URL's, i.e. ...
1
vote
0answers
55 views

Why don't merchants use chip reader on credit card terminal? [closed]

Most merchants I've been to in the past few years have updated their credit card terminals to accept the chip+pin system. My credit card has had a chip for the past two years. Yet on these new ...
3
votes
1answer
125 views

What's the advantage of passing credit cards via javascript vs. over the server (without saving it)?

I've noticed current credit card gateways like stripe and wepay encourage sending the credit card number via their js framework (which would use some iframe jsonp magic to pass the data). To my ...
30
votes
3answers
5k views

Why don't popular web services mask the CVV?

Most popular web services like PayPal, Google Wallet, and others do not mask CVV numbers, eg: (<input type="password">). As I read, the CVV is a security feature and it seems logical to mask it ...
3
votes
1answer
322 views

card.io & PCI DSS v3.0

I've researched for quite some time now, but I cannot find an answer to this question: If I touch card holder data in any way, I need PCI DSS v3.0 SAQ A-EP certification, which is quite complex to ...
0
votes
2answers
71 views

Library or service for rate limiting credit card transactions by IP [closed]

I have a simple product ordering form. A hacker is attempting to validate stolen credit card numbers by making two orders per minute with a bot. 99% of the orders are declined but some are ...
6
votes
6answers
415 views

Looking for credit card data and other PII in files

I'm looking for ways to check for the presence of credit-card data and other personally identifiable information in files on a network I'm testing. Currently i'm doing this manually with the usual ...
3
votes
2answers
161 views

Shop saves credit card data from guest orders

A web shop allows customers to order as guest or to create an account. I ordered as guest, entered my email address and the shipping address, and payed per credit card (I had to enter the security ...
3
votes
2answers
184 views

Credit Card Fraud Prevention - Why Aren't Simple Things Used?

I use my American Express card every day, sometimes multiple times. I do a mixture of card-present and card-not-present transactions. AMEX has decent fraud detection and I get notified quickly if ...
14
votes
3answers
1k views

Should I worry if my credit card payment processor's server allows only weak SSL cipher suites?

I tested their server using https://www.ssllabs.com/ssltest/ and, apart from the disappointing "B" rating (it handles financial transactions, after all), the server only allows the following two RC4 ...
2
votes
3answers
155 views

Businesses Handling Credit Cards via Email

I have done some I.T. contracting for a medium-sized Australian hotel recently. I am concerned about their credit card handling practices. Customers often email their CC number and expiry date in ...
36
votes
5answers
11k views

How does a website know if a certain creditcard number is wrong instantly

I was renewing my Internet subscription through the online portal of my ISP. What struck me was when I was entering my credit card details, I entered the type of my credit card (MasterCard, Visa, AA, ...
0
votes
1answer
422 views

How does SAQ A-EP apply in the situation where no I frames are used

I'm really disappointed in SAQ A-EP. I feel that as a web developer, there are just way too many questions that go over my head and I couldn't possibly know. I use primarily Stripe and Braintree in ...