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PQTS2026-07-22_012

PQ Transaction Signatures #012

2026-07-22 2 decisions 316 transcript lines

Transcript

Call summary

Targets
  • •ERC draft link posted to Telegram — Monday, July 28, 2025 - 01:02:28
Decisions
  • •Group maintains hash-based signatures (SPHINCS+) as primary target; FORS with ephemeral keys remains a parallel option - 00:23:55
  • •Proceeding to ERC drafting to avoid analysis paralysis; scope covers SPHINCS+ signing, account abstraction, CREATE2, and key rotation — no EIP/precompile required - 01:01:10
Highlights
  • Erc Drafting:
    • ·Antonio will fork the ERC repository and begin drafting a new ERC covering SPHINCS+ transaction signatures, account abstraction, CREATE2 derivation, and key rotation - 01:01:10
  • Fors Vs Sphincs Tradeoffs:
    • ·FORS wins on all axes (speed, size, gas) vs. SPHINCS+ variants except signature budget: FORS budget ~2^3–2^4; key rotation required every transaction to manage budget - 00:39:15
  • Account Abstraction Approach:
    • ·RivaLabs demo uses ERC-4337 smart accounts to register multiple SPHINCS+ signers per address; user selects parameter set per transaction at runtime - 00:34:47
    • ·Public keys stored in smart contract; address has no classical private key — wallet derived via CREATE2 from entropy; BIP44-style derivation per parameter set - 00:49:25
    • ·Signers can be added/removed post-deploy via smart contract function; no requirement to set up all parameter sets at wallet creation - 01:00:15
  • Sphincs Parameter Exploration:
    • ·RivaLabs presented tunable SPHINCS+ parameter sets: fast-signing, gas-saver, and standard variants with distinct size/verification/signing tradeoffs - 00:25:59
    • ·Use budget tunable: NIST standard allows 2^64 signatures; real use cases can target 2^16 (cold storage) to 2^32 - 00:28:55
    • ·Gas-saver variant: ~half the verification cost and signature size of fast-signer, but ~100M hashes to sign; impractical on constrained devices - 00:33:15
    • ·Antonio noted: aggregation-friendly (fast-verification) parameter set should likely be the default, as fewer verification hashes reduces ZK proof cost - 00:44:36
Action Items
  • •Antonio Sanso - Fork ERC repo, draft new ERC for SPHINCS+-based PQTS; post link to Telegram channel by Monday - 01:01:26

Key decisions

  • Group maintains hash-based signatures (SPHINCS+) as primary target; FORS with ephemeral keys remains a parallel option

    SPHINCS+ as primary target and FORS as parallel option

  • Proceeding to ERC drafting to avoid analysis paralysis; scope covers SPHINCS+ signing, account abstraction, CREATE2, and key rotation — no EIP/precompile required

    ERC drafting to avoid analysis paralysis

Links