[tor-bugs] #22776 [Obfuscation/BridgeDB]: Implement the remaining cryptographic protocols for Hyphae

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#22776: Implement the remaining cryptographic protocols for Hyphae
-------------------------------------+-------------------------------------
     Reporter:  isis                 |      Owner:  isis
         Type:  enhancement          |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:                       |    Version:
  Obfuscation/BridgeDB               |   Keywords:  bridgedb-distributors,
     Severity:  Normal               |  rust, SponsorM
Actual Points:                       |  Parent ID:  #22775
       Points:  3                    |   Reviewer:
      Sponsor:                       |
-------------------------------------+-------------------------------------
 We'll need:

 1) Back-Maxwell Rangeproofs (requires Borromean Ring Signatures)
 2) A ZKP compiler
 3) Testvectors for Ristretto (a.k.a. Decaf for curve25519)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22776>
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