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Proving protocol using OPRF with a password #5

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forty opened this issue Feb 19, 2024 · 1 comment
Open

Proving protocol using OPRF with a password #5

forty opened this issue Feb 19, 2024 · 1 comment

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@forty
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forty commented Feb 19, 2024

I'm trying out verifypal to prove some PAKE protocols, and I'm struggling with OPRF using passwords for blind salt, as in OPAQUE.

  • I cannot find out how to invert a scalar (the blinding factor, as I want to compute HASH(pwd)^r^k^(1/r) )
  • the verifier is unhappy because HASH(pwd)^r reveals the password. Ideally I want H2C(HASH(pwd))^r, I'm not sure how to communicate that to verifypal, but I guess that shouldn't reveal the password if r remains secret?
@forty
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forty commented Feb 19, 2024

(sorry, I don't know if this is a feature request, or just my own misunderstanding of how things work)

@forty forty changed the title Prooving protocol using OPRF with a password Proving protocol using OPRF with a password Feb 19, 2024
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