Editing Domain Name System (section)

===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,<ref>{{Cite journal|last1=Schmitt|first1=Paul|last2=Edmundson|first2=Anne|last3=Feamster|first3=Nick|title=Oblivious DNS: Practical Privacy for DNS Queries|url=https://petsymposium.org/2019/files/papers/issue2/popets-2019-0028.pdf |archive-url=https://web.archive.org/web/20220121210624/https://petsymposium.org/2019/files/papers/issue2/popets-2019-0028.pdf |archive-date=2022-01-21 |url-status=live|journal=Privacy Enhancing Technologies |date=2019|volume=2019 |issue=2 |pages=228–244 |doi=10.2478/popets-2019-0028 |arxiv=1806.00276 |s2cid=44126163 }}</ref> before DoH was standardized and widely deployed. Apple and Cloudflare subsequently deployed the technology in the context of DoH, as Oblivious DoH (ODoH).<ref>{{cite web |title=Oblivious DNS Deployed by Cloudflare and Apple |date=9 December 2020 |url=https://medium.com/noise-lab/oblivious-dns-deployed-by-cloudflare-and-apple-1522ccf53cab |access-date=27 July 2022}}</ref> ODoH combines ingress/egress separation (invented in ODNS) with DoH's HTTPS tunneling and TLS transport-layer encryption in a single protocol.<ref>{{cite web |last1=Pauly |first1=Tommy |title=Oblivious DNS Over HTTPS |url=https://datatracker.ietf.org/doc/draft-pauly-dprive-oblivious-doh/|publisher=IETF |date=2 September 2021}}</ref>