contrib: Add PIP-2030 Quantum Shield (Dilithium Mode3) Toolset #34607

1. 
   rsdenck commented at 7:38 pm on February 17, 2026: none

   Rationale

   This PR introduces contrib/pq-shield, a standalone toolset implementing CRYSTALS-Dilithium Mode3 signature scheme. This serves as a foundational step for PIP-2030, addressing the quantum vulnerability of ECDSA by 2030.

   Technical Approach

   • Algorithm: Dilithium Mode3 (NIST PQC finalist).
   • Implementation: Go-based wrapper around Cloudflare’s Circl library.
   • Components:
     • pq-shield: CLI for key generation, signing, and verification.
     • audit: Forensic tool for validating key formats and permissions.
   • Security: Includes fuzz testing and strict file permission checks (0600 for private keys).

   Tests

   • Unit tests cover key generation, signing round-trip, and tamper resistance.
   • Fuzz testing implemented for signature verification.
   • Verified locally on Linux/Windows.

   Impact

   No changes to consensus code. This is a purely additive tool in contrib/ for experimentation and future integration planning.

2. contrib: add PIP-2030 quantum resistance tool (Dilithium Mode3) 40cde61d0a
3. contrib/pq-shield: add contribution guidelines and usage instructions 9ef819fec4
4. DrahtBot added the label Scripts and tools on Feb 17, 2026
5. 
   DrahtBot commented at 7:38 pm on February 17, 2026: contributor

   ♻️ Automatically closing for now based on heuristics. Please leave a comment, if this was erroneous. Generally, please focus on creating high-quality, original content that demonstrates a clear understanding of the project’s requirements and goals.

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6. DrahtBot closed this on Feb 17, 2026

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7. 
   DrahtBot commented at 7:38 pm on February 17, 2026: contributor

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Scripts and tools