Add Web3 Foundation grant application

Author: grinzaharov-ui

applications/post_quantum_crypto_defender.md

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+# Web3 Foundation Grant Application
+
+## Project Overview
+
+- **Project Name:** Post-Quantum Crypto Defender
+- **Team Name:** PQ Security Labs
+- **Payment Address:** (твой Solana или Ethereum адрес — можно указать позже)
+- **Level:** 1
+
+## Project Description
+
+We are building open-source Rust tools for hybrid post-quantum cryptography, combining current blockchain standards (ed25519/secp256k1) with NIST PQC algorithms (Falcon-512, Dilithium). The project includes:
+
+1. A working CLI tool for hybrid key generation, signing, and verification
+2. Crypto-agility layer for pluggable post-quantum algorithms
+3. Key migration and rotation utilities
+
+The tools help wallets, dApps, and validators prepare for quantum computing threats ("Harvest Now, Decrypt Later") and major protocol upgrades.
+
+## Problem Statement
+
+Quantum computers (via Shor's algorithm) threaten current elliptic curve signatures (ECDSA, EdDSA) used in all major blockchains. Most ecosystems lack crypto-agility and production-ready migration tools. Polkadot/Substrate (written in Rust) needs post-quantum tooling to remain secure in the coming decade.
+
+## Solution
+
+We provide a practical Rust library and CLI with:
+
+- Hybrid signatures: ed25519/secp256k1 + Falcon-512/Dilithium
+- Simple commands: `generate`, `sign`, `verify`, `info`
+- Open-source (MIT license)
+- CI/CD pipeline with tests
+
+## Technical Details
+
+**Current State (Working Prototype):**
+
+- 22+ commits, active GitHub repository
+- Fully functional CLI with 4 commands
+- Key sizes: private 1313 bytes, public 929 bytes, signature 730 bytes
+- Built with Rust, `falconed`, `clap`, `hex`
+
+**GitHub:** https://github.com/pissapisa500-debug/post-quantum-web3-security
+
+## Roadmap (Milestones)
+
+| Milestone | Duration | Deliverables | Amount |
+|-----------|----------|--------------|--------|
+| **M1** | 4 weeks | Complete Rust library with hybrid signatures + unit tests | $4,000 |
+| **M2** | 4 weeks | Substrate/Polkadot integration example + documentation | $3,000 |
+| **M3** | 4 weeks | Security audit preparation, CI/CD improvements, v1.0 release | $3,000 |
+
+**Total Requested:** $10,000 USD (Level 1)
+
+## Team
+
+**Members:** Single independent Rust developer (can expand team after funding)
+
+**Background:**
+- 5+ years experience in systems programming
+- Strong cryptography focus
+- Working prototype already delivered (proof of work available)
+
+**Code repository:** https://github.com/pissapisa500-debug/post-quantum-web3-security
+
+## Why Web3 Foundation?
+
+1. Polkadot/Substrate is built in Rust — our exact tech stack
+2. Web3 Foundation actively funds cryptography and developer tooling
+3. Level 1 grants ($10k) are designed for independent developers like us
+4. No corporate entity required — we are crypto-native builders
+
+## Future Plans
+
+- Integrate with Substrate's signature framework
+- Add support for more NIST PQC algorithms
+- Maintain as open-source public good
+- Seek follow-up funding for Level 2 grant after successful delivery
+
+## Additional Information
+
+- **Open-source license:** MIT
+- **Proof of Work:** Working CLI tool with 22+ commits, CI/CD passing
+- **Relevance to Polkadot:** Rust-native, can be directly integrated into Substrate-based chains