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Tools for Privacy-Enhancing Technologies

on YouTube 40m
Talkat RSA Conference 2023 · 2023-04-24..04-27· [cryptography]

speakers

name:Ismail Afia
links:none on file
name:Joakim Brorsson
links:none on file

resources

video:https://youtu.be/IIpkUJY3c6U
slides:none on file

summary

Two linked tools: PAPR builds publicly auditable privacy revocation for anonymous credentials by having users create local hidden committees via a non‑interactive commit‑and‑shuffle so issuers select anonymous committees, secret‑share identities to them, and force any revocation to post on a bulletin board; construction proves UC security and uses zero‑knowledge proofs for correctness. UP3S is an unlinkable policy‑based sanitizable signature scheme that instantiates rerandomizable signatures with Pointcheval-Sanders RDS and Ghadafi DTABS to give unlinkability, attribute‑based sanitization without group signatures, and separate tracing for accountability.

AI-written summary · about

chapters (10)

  1. 0:00Introduction and speakers
  2. 0:21Privacy versus surveillance conflict
  3. 4:05Conditional privacy solutions
  4. 10:35Hidden committees concept
  5. 17:30Q&A with Joakim
  6. 23:52Introduction to sanitizable signatures
  7. 28:10Policy-based sanitizable signatures
  8. 31:43Unlinkable policy-based signatures
  9. 37:09Q&A with Ismail
  10. 40:03Closing remarks

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