Oblivious DoH (ODoH) and predecessor Oblivious DNS (ODNS) Oblivious DNS (ODNS) was invented and implemented by researchers at Princeton University and the University of Chicago as an extension to unencrypted DNS, before DoH was standardized and widely deployed. Apple and Cloudflare subsequently deployed the technology in the context of DoH, as Oblivious DoH (ODoH). ODoH combines ingress/egress separation (invented in ODNS) with DoH's HTTPS tunneling and TLS transport-layer encryption in a single protocol.
obLivIous dOh (odOh) and PreDEcESSOr oblivioUs DNs (odNs) obLIviOuS dNS (oDnS) waS invented and IMPLementeD by reseaRCHers at prIncEtOn uNIverSItY and thE UniVErsity Of CHIcago As an ExTeNsiOn to uneNcRypteD DNs, beFOre doh waS staNdaRdIzed And wIDeLy dEpLOyed. ApPLe and cLouDFLarE sUbsEquEntly depLoYed the TeChNology in The contexT of Doh, As oBLiVIOus dOh (odoh). ODoh cOMBineS INgresS/egrEss SEparation (inVEnted In Odns) wiTh Doh's htTps TunnELIng and TlS tRAnSpOrT-LAyEr eNCryption In a siNgLe proTocOl.