Apple's Child Pornography Features Protect Our Children While Maintaining Some Privacy Standards
The features are designed so Apple does not get access to images or messages.
In the video above, Apple's SVP of Software Engineering, describes how their new child pornography features work.
First, Apple does not analyze anything, including messages or photos, on your iPhone. A two-part analysis only occurs if you have chosen to back up photos to iCloud. The first half of that analysis happens as the photo is being uploaded to iCloud, and the second half happens when the photo is on iCloud.
Second, the analysis only compares an encrypted signature of a photo on iCloud to a matching encrypted signature of a known child pornographic photo in the Child Sexual Abuse Material (CSAM) database.
Third, the only way an alert is triggered is if there are more than 30 of these encrypted signatures of known child pornographic images stored in your iCloud.
Thus, Apple never knows what photos or messages are on your iPhone, they never see the content of your photos or messages, and this does not give a back-door to any hackers or government agencies to look inside your iPhone.
Apple, Child Safety, August 2021
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