Visa Advertising Solutions (VAS) Opt Out

Post by chronomex » Wed, Dec 30, 2020, 4:11 AM UTC

soared wrote: post #103

1-6 wrote: post #58

Sometimes I wonder how certain deals show up as website advertisements and recommendations. Certain blog posts or forum posts appear magically in my search result knowing what I was planning for. Deals and YouTube recommendations also seemed coincidental. Now I know that my debit card has been also leaking my purchase patterns and location. I better add more hosts to my Raspberry Pi-Hole.

Your credit card mostly on gets merchant name and total purchase value, so the uses are fairly niche. It’s more likely merchants themselves indirectly selling your purchase data. You can sometimes click the small blue triangle in the corner of an ad (called adchoices) to see how it was targeted.

Post by texasbigdata » Wed, Dec 30, 2020, 4:14 AM UTC

asdfasgasdgasdg wrote: post #88

throwaway894345 wrote: post #2

The form doesn't require any sort of authentication, so I imagine someone could write a script to submit all (or a large portion of) the set of card numbers to this API. Might need to work around rate limiting and so on, but seems feasible?

Haven't people been sent to jail for doing this much or less? I recall something happening to a guy who probed AT&T's phone number registry or something?

Post by bitexploder » Wed, Dec 30, 2020, 4:20 AM UTC

texasbigdata wrote: post #112

bitexploder wrote: post #93

Earlier quoted context omitted.

100ms is /massive/ for a timing delta but you really need a lot of samples. I have exploited timing deltas that were not much more than a handful of machine code instructions in terms of execution time. But you really do need a lot of samples to confirm small deltas. It starts getting impractical for many APIs (someone will notice, hopefully).

This comment is why I love hackernews

Post by mcswell » Wed, Dec 30, 2020, 4:24 AM UTC

disown wrote: post #110

Is it just opt out once forever or do you have to "opt out" each time they update and send you a new card holder agreement? Who has the discipline to read each packet Visa sends you every few months and re-opt out each and every time? Out of pure attrition, I'm guessing 99% of their customers will eventually be "opt-in". Besides, considering that Visa, Mastercard, etc are all headed toward "data and AI" model, it's n…

Post by bolasanibk » Wed, Dec 30, 2020, 4:30 AM UTC

soared wrote: post #103

1-6 wrote: post #58

Sometimes I wonder how certain deals show up as website advertisements and recommendations. Certain blog posts or forum posts appear magically in my search result knowing what I was planning for. Deals and YouTube recommendations also seemed coincidental. Now I know that my debit card has been also leaking my purchase patterns and location. I better add more hosts to my Raspberry Pi-Hole.

Your credit card mostly on gets merchant name and total purchase value, so the uses are fairly niche. It’s more likely merchants themselves indirectly selling your purchase data. You can sometimes click the small blue triangle in the corner of an ad (called adchoices) to see how it was targeted.