... If I had dug just a bit deeper before posting :) > Today, this type of reporting requires at least one party to learn which specific people made a purchase

... If I had dug just a bit deeper before posting :) > Today, this type of reporting requires at least one party to learn which specific people made a purchase after seeing a specific ad. With MPC, say one party has the information about who saw an ad and another party has information on who makes a purchase. MPC and encryption make it possible for both parties to learn insights about how an ad is performing, without the need to entrust a single party with both data sets. https://about.fb.com/news/2021/08/privacy-enhancing-technologies-and-ads/ https://about.fb.com/news/2021/08/privacy-enhancing-technolo...