Antigone and her team have traveled around the world meeting with victims of NCII (the official term for revenge porn) and advocacy organizations, trying to answer a really tough question: how can we empower victims to stop the spread of nude images.
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Imagine you are in the situation faced by thousands every year: somebody has intimate images of you and they are threatening to spread them to your friends and family. They might be extorting you for money, more images, or just trying to cause you terrible harm.
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What do you do? Having your images posted and then taken down hours later is not an acceptable solution, you want a way to prevent those images from spreading at all or making the jump to a major platform. You need a way to *preemptively* block images from being posted.
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Replying to @alexstamos
Would it be possible to have a local software hash the pictures and then only upload the hashes? Purely technical question.
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Also would allow reverse engineering to make images that look the same but don't have matching hashes. The underlying tech is really fragile in that sense, is my understanding.
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Replying to @Allan_Wirth @josephfcox and
Ah-ha, that's where SGX comes into it, there's no need to expose an oracle to reverse engineers. The enclave can hide the output and operation of the hashing.
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Replying to @taviso @josephfcox and
I saw your other tweet and agree there's a good SGX use case here. It would be nice if they offered both options, because "download this client app and enclave to put your photo in" comes with its own palatability issues.
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Replying to @Allan_Wirth @josephfcox and
Agreed, although it seems a lot more palatable to me
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Replying to @taviso @josephfcox and
Yeah. I think this is all about giving users more options+power+control. I wonder if most users of this tool are mobile and wouldn't be able to use SGX anyway.
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I did consider that argument, but it seems that a trusted intermediary (e.g. an advocate, shelter worker, etc) could run the software and send the output to facebook for those without access to sgx. This way facebook don't get the nudes, and the advocate is easier to trust.
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Replying to @taviso @josephfcox and
Yeah, but there's no way to get the photo from phone to enclave without going through OS. Still, giving users choice over who to trust is a big win. I wonder if there's other DRM tech with applicability here. Reminds me of secure a/v path issues.
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