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{{Short description|A function computed by two parties that emulates a random oracle.}}
An '''Oblivious Pseudorandom Function''' (OPRF) is a [[Cryptography|cryptographic]] function, similar to a [[HMAC|keyed-hash function]], but with the distinction that an OPRF is [[Secure_multi-party_computation|cooperatively computed]] by [[Secure_two-party_computation|two parties]].<ref name="oprf">{{cite journal |last1=Casacuberta |first1=Sílvia |last2=Hesse |first2=Julia |last3=Lehmann |first3=Anja |title=SoK: Oblivious Pseudorandom Functions |journal=Cryptology ePrint Archive |date=2022 |volume=Paper 2022/302 |url=https://eprint.iacr.org/2022/302}}</ref>
== Formal Definition ==
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