[CFRG] ORPF patent and prior art
Fraser Tweedale <ftweedal@redhat.com> Tue, 24 November 2020 03:52 UTC
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Subject: [CFRG] ORPF patent and prior art
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Hello, While researching ORPFs I came upon a recently granted patent that appears to cover the main ORPF protocol defined in https://datatracker.ietf.org/doc/draft-irtf-cfrg-voprf/: US Patent 10841080: Oblivious pseudorandom function in a key management system - https://patents.justia.com/patent/10841080 There is substantial prior art, including a scheme due to Nathaniel McCallum and Bob Relyea (2015) <http://marc.info/?l=cryptography&m=144192341714831&w=2> and its use in the "Tang" system for automating decryption of disks or other secrets (https://github.com/latchset/tang). And possibly elsewhere. Regards, Fraser
- [CFRG] ORPF patent and prior art Fraser Tweedale
- Re: [CFRG] ORPF patent and prior art Hugo Krawczyk