CSAM Detection - Technical Summary

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CSAM Detection Technical Summary August 2021. Contents Introduction 3. System Overview ........................................ ........................................ ........................................ .....................4. Technology Overview ........................................ ........................................ ........................................ ...............5. NeuralHash ........................................ ........................................ ........................................ ..........................5. Private Set Intersection (PSI) ........................................ ........................................ .......................................6 . Threshold Secret Sharing.

given account. This is further mitigated by a manual review process wherein Apple reviews each report to confirm there is a match, disables the user’s account, and sends a report to NCMEC. If a user feels their account has been mistakenly flagged they can file an appeal to have their account reinstated.

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