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63
votes
10answers
24k views

Can I scratch off the magnetic strip off a debit card to only allow chip and PIN?

I have been robbed in the past by thieves using my HSBC Debit Card (issued by UAE branch) to purchase mobile phones and accessories by signing for the purchases. While the card has chip & PIN ...
48
votes
5answers
26k views

What's the impact of disclosing the front-face of a credit or debit card?

There are quite a few cases where people are called out for disclosing the front-face of a credit or debit card (e.g. this tweet from Brian Krebs or this twitter account). So I was wondering what the ...
47
votes
4answers
12k views

Detecting skimmers and other ATM traps

This question has been bothering me ever since I first heard of ATM skimmers: Instances of skimming have been reported where the perpetrator has put a device over the card slot* of an ATM (...
33
votes
8answers
3k views

Dealing with excessive “Carding” attempts

We are currently setup using Magento on a LAMP stack for our e-commerce platform. As of a month or two ago we began noticing a lot of carding attempts against our website. All attempted transactions ...
23
votes
7answers
8k views

How to prevent cheating (extra votes) in online contests?

Mitigating Cheating & Voter Fraud in Online Contests… We run online contests of various sorts that involve users voting on entries (usually one vote per user per day). The prizes range from ...
22
votes
4answers
44k views

What is the use of stolen credit card details?

What can a person with stolen credit card details do? Buy porn? Buy tons of server resources to perform an attack? What else? I'm sure that if he buys books, shoes and bicycles or transfer funds ...
13
votes
2answers
2k views

Should I change phone number and e-mail address after PayPal fraud?

I have been the victim of PayPal fraud. I hadn't used PayPal in a year and then within 9 days there were three unauthorized transactions on my account for a total of 150 Canadian dollars and 290 ...
13
votes
5answers
451 views

I need ideas for blocking a single malevolent user

Let me throw out this problem I'm having to some of my technical peeps and see if you guys have any new suggestions: We have a website that sends text messages and voice mails for our clients. ...
11
votes
4answers
19k views

How do location-based apps avoid getting cheated by emulated GPS?

Some apps like Foursquare require the user to "check in" at physical places, in order to gain money benefits. Given that emulated GPS are available for customized versions of Android, it sounds easy ...
8
votes
5answers
18k views

How is Chase Mobile Deposit Secure?

Chase has this app that allows you to snap a picture of a check with your phone and deposit that check into your account. How do they prevent: Someone from depositing a check that's not written to ...
8
votes
1answer
1k views

Why is it hard to prevent scalpers from using bots to buy up lots of concert tickets?

The New York Times recently has an article that talks about how scalpers are using bots to programmatically buy up lots of concert tickets, making it harder for ordinary fans to buy up tickets. For ...
8
votes
2answers
580 views

Are social security numbers useless by themselves?

If 453.7 million social security numbers have been issued to date. And there are only 1 billion = 1000 million distinct 9 digit integer pairs. Then that means if I were to make up any 9 digits, that ...
7
votes
4answers
452 views

Candidate authentication in large scale assessment

First of all, I'd like to apologize beforehand if the questions I am about to ask are not really suitable for this site. I could not think of any other category to post under. Right, here goes. We're ...
7
votes
5answers
3k views

Preventing online voter fraud

As part of a promotional campaign, my company wants to launch a site where users (and potential users) of our product will be required to register and vote for certain choices. Depending on how ...
7
votes
4answers
255 views

Bank website forwards to false site - formatted hard drive - still forwards

Summary: When I visit my bank's website, I get forwarded to a phishing mirror site. This has persisted through a re-format of my MacBook. Even on different browsers! Other computers on the same ...
7
votes
5answers
680 views

How to prevent pay per show/click abuse?

We have a webapp. 3rd party websites put our banners on their pages (banner is a snippet of HTML). They are paid for it using "Pay per click" or "Pay per show" methods. So 3rd party website's owners ...
7
votes
3answers
842 views

Credit card fraud prevention

The project that I am working on requires processing of credit cards. Is there any way to detect cloned/counterfeit cards? Are there any proven workarounds to prevent credit card fraud or misuse? We ...
6
votes
4answers
849 views

Source code auditing and fake builds

I am wondering about source code auditing and how hard it would be to fake a build to be audited? Let me explain. Say I would be a dishonest programmer that would wish to put in some backdoor into ...
6
votes
3answers
550 views

Fraud prevention on online transactions

We operate an e-commerce website, and we're facing some big problems with payments. Very often, some customers get credit card data and use those in our store. So when the real credit card owner gets ...
5
votes
4answers
2k views

Signature instead of PIN, Visa card

Most of the credit cards require PIN to authorize transaction. Recently upon a transaction the merchant required my signature and not my PIN. I understand this is another sort of authorizing the ...
5
votes
3answers
234 views

Best way to handle identity theft incident?

A user's email is hacked, contacts copied, and similar emails (look alike emails with minor spelling differences) are created by the attacker with the same name and avatar, sending relatively well ...
5
votes
1answer
195 views

I emailed someone a picture of a check I wrote for them. What now?

On a whim, I emailed the intended recipient of a check I wrote a picture of that filled-in check to indicate I was about to mail it out. The full front of the check, with amount, my signature, account ...
5
votes
1answer
82 views

Countermeasures for a family-member attack on a password reset procedure

Given an account reset procedures, there are usually some recovery questions, and in better implementations a link will be sent to confirm the password change via email or SMS. Therefore, the attacker ...
5
votes
1answer
775 views

Trying to prevent Cisco toll fraud

A little back story on the setup first; We have a Cisco VoIP setup at our remote office(where I'm at) and the main CCM/CCX/Unity setup is at the parent company across the US in Connecticut. We have ...
4
votes
3answers
4k views

How can I prevent my E-mail address from being used as the sender for fraudulent/scam messages?

Recently, me and at least one other person I know received an obvious scam E-mail that starts off something like this: We considered your resume to be very attractive and we thought the vacant ...
4
votes
2answers
606 views

What is the severity of a fake certificate?

I'm not a security specialist, thus reading this Google Blog post about a fake *.google.com certificate, raises a lot of concerns, if anyone can impersonate a website, especially a google website, my ...
4
votes
1answer
88 views

Is it possible to clone my contactless debit card while it's in my pocket?

I have a bank account that I never use, someone cloned my debit card and used it to buy something in Brazil in order to make sure the cloning was successful then they started making transactions of £...
4
votes
1answer
127 views

Giving merchant account information to web programmer

Our web programmer needs our merchant account information to set up our ecommerce site. He is asking for the "processor name", "processor ID" and "merchant ID". If I provide him with the information ...
4
votes
1answer
76 views

Wiping magnetic stripe on card with magnet?

I asked a question a while back on using magnets (for example powerful Neodymium ones) to wipe a HDD, and got shown a good article proving it is not possible to wipe data. Pretend I am about to ...
3
votes
1answer
143 views

How safe is my contactless bank card?

In the past few years Contactless Payment cards have been introduced and I have been reading some articles surrounding security of these cards. The following article "Stealing data from contactless ...
3
votes
1answer
259 views

Fraud Mitigation - Card Present Transactions

When it comes to fraud screening for card not present transactions (credit card / debit card) there are a number of techniques / services that can be utilized to mitigate risks from fraudulent ...
3
votes
2answers
939 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 ...
3
votes
1answer
221 views

how can my bank have a wrong phone number entered with my personal account information?

the other day at our bank, while my wife and i were transferring some funds between accounts, we found that on one of the accounts, a phone number that has no relationship to either of us was listed ...
3
votes
0answers
144 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 ...
3
votes
0answers
67 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 ...
3
votes
1answer
180 views

What prevents “money card” (offline smartcard system) from getting duplicated for payment fraud?

I don't know how well known this system is or maybe there are equal systems better known international. So I'll introduce the related points of the system: It is a paymentsystem where your wallet is ...
2
votes
3answers
143 views

Emailing debit card details to a guesthouse

I'm trying to arrange a holiday out to the Aran Islands, and the guesthouse emailed me back confirming that they do have a room available. But here is the catch: they want me to email my credit card ...
2
votes
4answers
3k views

How to detect bots clicking a link?

I own a url shortening service. I want to deliver only legitimate statistics to my clients. There are possible scenarios that a particular user writes a script to automatically open the shortened URL, ...
2
votes
2answers
112 views

Can two users share the same Request.UserHostAddress?

I am working on an ASP.NET MVC-5 web application, which is available to public users (no login is required). And I need to prevent the same user from submitting more than 5 "contact us" requests ...
2
votes
1answer
235 views

Single button click mobile direct carrier billing fraud

A friend of mine had just had the following happen: He visited a website with the mobile phone using Chrome Mobile on Android An advertisment poped up that covered the whole page There was no close ...
2
votes
2answers
139 views

ATM skimming with magnetic stripe

I have a question about ATM skimming. If ATMs in the UK still accept magnetic stripe can't a thief still use a cloned card at the ATM to withdraw money?
2
votes
1answer
71 views

Router as MITM to steal data

I was reading a blog post about ATM skimming and the following quote (at the end of the article) caught my eye: Ivanov allegedly used two devices — a router to steal the bank data of customers ...
2
votes
1answer
89 views

How to protect myself from future fraud? [closed]

Recently, I had my credit/debit card from my bank "stolen." The thieves somehow got my card number and information and took quite a bit of money from my account. Fortunately, I was able to recover it ...
2
votes
0answers
53 views

How to reduce Adwords click fraud (botnet clicking ads)? [closed]

I hope this is the right place to ask (here is a similar question but the answers aren't specific for AdWords). My Google AdWords campaign has been under attack for the past 3 days. Bots from ...
2
votes
1answer
54 views

Can multiple transactions of the same amount in a short time be considered fraud/corruption?

Back story In South Africa there is a website where I can buy prepaid electricity online for my apartment. When buying I did not get the token to use on my metered box. I had a chat with them today ...
2
votes
2answers
128 views

Are there any ways to defraud a fundraising site?

I have developed a many e-commerce stores for clients over the years; almost all of them selling physical products. Recently, one client in particular was repeatedly getting hit with fraudulent ...
1
vote
1answer
146 views

How to know somebody's IP? (Fraud victim) [duplicate]

I was victim of fraud (fool me) in Mexico and my only hint is a GMail account, so I can contact him from an anonymous mail. From what I've read, GMail's headers don't contain the sender's IP. What ...
1
vote
1answer
283 views

“Inverted” asymmetric encryption

I am developing a system to prevent frauds in tickets. What do I need? An algorithm to generate a QR Code that will be shown to my clients in a ticket. An algorithm to validate (offline) the ...
1
vote
4answers
286 views

Fraud detection to avoid fake users

I know there is no 100% solution for fraud detection, but at least I want to set some level of confidence in this use case. Suppose that I have a system where: A user need to make a registration A ...
1
vote
1answer
847 views

How long does it take for Google to detect click fraud and suspend an AdSense account? [closed]

Click farms can be hired to boost ad revenue. http://www.security-faqs.com/what-is-a-click-farm.html The click farm is made up of armies of low paid workers who’s job is to click on links, surf ...