[bitcoindev] [BIP Proposal] Hybrid SPHINCS+ / secp256k1 Key Derivation for Quantum-Resistant Paper Wallets

["'3D' via Bitcoin Development Mailing List" <bitcoindev@googlegroups.com>]

[-- Attachment #1: Type: text/plain, Size: 1662 bytes --]

Hi all,

I'd like to propose a new wallet-layer BIP for a practical hybrid post-quantum key derivation scheme.

**Title:** Hybrid SPHINCS+ / secp256k1 Key Derivation for Quantum-Resistant Bitcoin Wallets

**Summary:**
This BIP defines a simple, immediately usable method that combines NIST-standardized SLH-DSA (SPHINCS+) with the 3’s Company HE-SD (High-Entropy Seed Distillation) algorithm (which uses SPX-QEC for cleanup) to derive ordinary secp256k1 private keys and standard Bitcoin addresses (legacy + BIP-341 Taproot).

The process is fully offline, runs on low-end/air-gapped hardware (Raspberry Pi class), and produces keys that work today with Electrum, bitaddress.org, and Bitcoin Core; no consensus changes required.

**Reference implementation & full code:**
https://github.com/DigiMancer3D/bip-xxx-sphincs-hybrid

**Draft BIP text:**
https://github.com/DigiMancer3D/bip-xxx-sphincs-hybrid/blob/main/bip-xxx.mediawiki

This is intended as a practical bridge for quantum-hardened cold storage/paper wallets while post-quantum consensus migration is still in the future.

Happy to answer questions, incorporate feedback, and make any changes needed.

Thanks,
DigiMancer3D

-- 
You received this message because you are subscribed to the Google Groups "Bitcoin Development Mailing List" group.
To unsubscribe from this group and stop receiving emails from it, send an email to bitcoindev+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/bpSypbIuSoDinhE-Y4CrVI5LGHrJ_I79xYUzpYswA5JGkbASwibq94UozeR2jsu48vH6FZLdEBPpWHgIuVtSpUNy-tRpnGfe1hce2ti8k5w%3D%40protonmail.com.

[-- Attachment #2: Type: text/html, Size: 2277 bytes --]