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I still don’t think companies serve you ads based on spying through your microphone
(simonwillison.net)
this post was submitted on 02 Jan 2025
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There are billions of smartphones out there. Thousands of people getting ads relevant to what they just discussed is normal. And it's not just about the number of stories. It's also about how unscientific these reports are as well. If you want to come up with actually useful evidence you would have to test this multiple times to prove it's not random and you would also have to objectively measure the effect. You need to show a significant increase in the probability of getting a relevant ad, which in turn means you need to know what the baseline probability of getting one is (when the phone has not been allowed to spy on you).
All that being said, I don't think proving that smartphones spy on us is all that useful. The fact that it can happen very easily is already a problem. Security and privacy are protected when we design systematic solutions that prevent abuse. They are not protected in unregulated systems where we might sometimes prove abuse has happened after the fact. There's plenty wrong with a modern smartphone regardless of whether it happens to be spying on you right now.
Btw, I think it's pretty much accepted fact that smartphones do spy on everyone. It's the main business model of any big tech company. Google, Meta... They definitely have algorithms to tailor their targeted ads to someones personal profile. And per default they look at what you're doing online all day. Keep track of your location if they can... The one thing that's unclear is whether they use the microphone and also listen to your offline conversations. My main point being: Listening in with the microphone isn't that far off. If you feel uncomfortable with that, you might want to re-consider a few other things as well.
Thanks for the heads up. I am aware of the spying issues with smartphones (and any way you access the internet really). This is part of the reason why I don't think proving the unauthorized use of the microphone to spy is really important and why we need systemic solutions to prevent abuse in any case.
Can there really be an objective measurement? You should think first thing data harvesters would implement is a sort of cloak, to erase any traces of what's going on. Think Dieselgate, but more sophisticated. E.g. phone detects it's being tested the way you described, or is in the hands of a state attorney or whatever, the recording/ forwarding/ prcoessing of data stops.
That's only really feasible for phones they knowingly send to regulators. The phone would have no practical way of knowing that I'm having staged conversations around it and keeping track of the ads I see.
But even if you're right, that doesn't change the fact that a lack of objective measurement means all these stories are unreliable.