Also known as: authorized digital sellers

An IAB-led initiative designed to reduce certain types of ad fraud and arbitrage.

It’s an upgrade to another IAB project – ads.txt – which also aims to reduce fraud and improve transparency in the programmatic ad-buying process.

Ads.cert introduces cryptographically signed bid requests, authenticates a publisher’s inventory and allows buyers to track the path of inventory to make certain they’re only purchasing from authorized sellers.


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