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cfrg / draft-irtf-cfrg-voprf

Oblivious Pseudorandom Functions (OPRFs) using Prime-Order Groups
https://cfrg.github.io/draft-irtf-cfrg-voprf/#go.draft-irtf-cfrg-voprf.html
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Introduce a counter to `Blind` #321

Closed daxpedda closed 2 years ago

daxpedda commented 2 years ago

Currently some inputs exist that can't be used in Blind because they could yield the identity element through HashToGroup. One solution to this problem could be to introduce a counter, like in DeriveKeyPair.

From #320.

chris-wood commented 2 years ago

This doesn't solve the problem. It just makes the (already negligible) probability of failure smaller.

daxpedda commented 2 years ago

This doesn't solve the problem. It just makes the (already negligible) probability of failure smaller.

As discussed in #320, this is pointless.