Facebook is on the edge of implementing a disastrous decision. It must change its mind. wp.me/p16n9D-2yH
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Security, privacy & safety form the three legs of the stool. When 1 key pillar is undermined, the stool falls over. E2E encryption may be the direction but what steps are being taken to continue the fight against online child exploitation & to ensure that battle isn’t undermined?
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Replying to @tweetinjules @johnc1912
The challenge is you want airtight E2E encryption for activists and journalists operating in repressive countries, but that makes it more difficult if you rely on surveillance to combat criminal activity. Yet surveillance capabilities can be compromised by foreign adversaries.

Jun 25, 2019 · 5:05 PM UTC

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Replying to @bilcorry @johnc1912
I don’t think any of those imperatives are being questioned in @John1912’s blog - there is always going to be a question of balance. This particular ? is about all the work that has been done with PhotoDNA & other image matching technologies to detect & surface CSE.
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Keep in mind that John cited takedown numbers from closed Facebook groups. That’s on the main platform and isn’t getting E2E encryption. I don’t know how many pictures are sent via Messenger, but FB could still capture hashes and send with encrypted message for detection.
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Replying to @bilcorry @tweetinjules
No. The question is do you want to retain the ability to detect known illegal content? Nothing more. Nothing less. Moreover encryption does nothing to shield or disguise location data or other key bits of communications info that can be derived from Facebook's apps.
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There’s a cost of harm to not having E2E encryption. Perhaps fighting CSAM outweighs those risks, but they do exist and are not addressed by exclusively framing the decision based solely on access to illegal content.
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