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After merchants process a transaction, they cannot store the code, according to the Visa website. They don't support other obvious things either, like passing in the shipping address and ip address so they can be used for fraud detection. Yes, there are outboard services MaxMind,etc you can use, but they are working with a small subset of transactions, so their algorithms and blacklists are incomplete. ScottBurson on Dec 4, Name matching doesn't work??! I guess you must be right, or this attack wouldn't be possible, but holy shit that is fucked up.
Does not work, outside of AMEX cards. You can put anything you want in the cardholder name fields. Matercard supposedly has a single back end but VISA does not, according to the article. Given the distributed nature of the attack I imagine only the card processors could detect it; if you pick sufficiently broad set of web site to test with the chances of them sharing a server that could detect something is probably low.
I remember seeing the VISA security centre, where they monitor threats etc. It was a huge high tech facility. I would think that they flag if a card is attempted a lot of times in short time span. Apparently, VISA does not do this. As another poster said, you don't run one card times. You run cards 10 times and achieve almost the same probability of guessing one without burning the card.
Quit concatenating more codes and just go to an alpha numeric model. You could have fewer digits and a bigger probability space. Even when you remove certain letters that sound alike. Zyst on Dec 4, That frankly sounds like a strong security argument to use MasterCard over Visa. But more research on how MasterCard would handle a similar attack might be necessary.
This does not require hindsight - it is literally the first thing you would ask about in an audit of the system's security. The real issue is what it says about the competence of the people running these systems. Do you audit credit card security systems or are in a related industry?
I personally tend to air on the side of NOT assuming people I have never met working on a problem I have never had to try to solve and therefor may not see all the complexity are incompetent.
I find it way more likely they are competent it is just a problem that is significantly more complex when dealing with the kind of big-data volume they do than it would be on a smaller scale.
Actually, I have worked on the development of security software, but if you want a source, I suggest you start with the work of the researchers mentioned in the article. Among the facts there, you can find that Mastercard is apparently capable of detecting these guessing attempts, so as we are on the subject of sources, what is your source for your suggestion that this is an insurmountable volume-related problem? You have a point about not casually attributing incompetence, but this does seem to be a particularly facepalm-inducing issue.
I am willing to be corrected. But a problem not being insurmountable does not make you incompetent for not solving it yet. Curing cancer is not insurmountable yet we don't call scientist incompetent for not having it done yet at least I don't. And before you say it. No, I am not saying this is as difficult as curing cancer. I don't know enough about the issue to correct you or not. I just know a lot of great software engineers who have poured their sweat and blood into systems only to be called incompetent.
I've also seen open source developers develop brilliant pieces of software and then get called incompetent for a single bug. Because the bug was "obvious" in hindsight That kind of attitude keeps people from taking risks. I personally think we need to encourage people to go into the tough problems and a lot of people won't if they risk being ridiculed for not solving them.
The situation is not remotely like the scenario you are concerned about. We the e-commerce industry collectively have a history of making many of the same basic security mistakes repeatedly, even though both the mistakes and the ways to avoid them are well-documented SQL injection is a classic example, as is the use of easily-guessable secrets.
In my opinion the source of which is me the industry should be held accountable for its complacency and, yes, lapses in competence. Of course, being criticized by me in an HN comment is hardly being held accountable. It's absolutely insane. Setting up a distributed key-value system with some basic API shouldn't take more than a few days.
That's why you should enable two factor authentication on your credit card: online transactions would require confirmation with single-use password you receive by SMS. I used to work in e-commerce and my company simply disabled the SMS protection because it would harm sales and the platform would sometimes completely crash.
On the other hand there is no way that I know of that I, as a customer, could prevent my card being used in non secured websites. So this system makes legitimate purchases harder and doesn't prevent fraud. We need a different technology than credit card for online payments, they are not secured enough and any layer of security that we add around them won't work.
What cards allow this? I would do it in a second if that was a thing I could actually have. CmdrSprinkles on Dec 5, Make a purchase, then sign off on your phone or fingerprint reader on your laptop.
It obviously won't resolve the issue posed in the article, but it is definitely a step in the right direction and many of the major CC companies are integrating more and more. Obviously the approved services thing is a concern, but not a huge one.
These attackers are probably brilliant enough to make their mark in the honest tech business world. I suppose they are driven by the challenge of the crime. I suspect they live in countries without the rule of law so they have little incentive to make an "honest" living.
More importantly, an "honest" living as a developer probably makes them pennies compared to online fraud. He means in those countries. If you're not American, you're screwed because you can't get to America legally. SV and NY are not the best places to go once you consider quality of life.
Most of them are less crowded and less expensive, usually by a huge amount. ForFreedom on Dec 5, If you total the credit card numbers for any particular card the answer would be the same. For example: totaling the visa credit card number might be The hackers would have to guess the 3 set of numbers if they get the fourth set. Another one of those technologies which hasn't kept up with the evolving tech landscape. It's pretty unfortunate that there is absolutely no federated, popular, and secure payment system in the US due to consumers and merchants simply sticking with older systems simply because "it's what we've always done.
There are many parties that would gain from a better payments system. However the logistics of improving it are significant due to the number of highly regulated and kinda-fat and kinda-happy entities running the infrastructure.
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