Post-Quantum Sovereign Privacy Storage

Post-Quantum Sovereign Privacy Storage (PQSP) is a future-proof private data layer built on 0G that ensures complete data sovereignty through post-quantum hash commitments and on-chain verification.

While the 0G network provides highly scalable and decentralized data availability, storing sensitive data on public networks poses inherent privacy risks, especially with the rapid advancement of quantum computing. PQSP solves this by acting as a sovereign shield. It combines client-side authenticated encryption (XChaCha20-Poly1305), post-quantum state commitments (SHAKE256), native 0G Storage integration, and an EVM-based on-chain verifier registry PqspVerifier.sol) on the 0G Chain. This architecture guarantees that only the true data owner can decrypt the payload, while the integrity and existence of the data can be cryptographically verified by anyone against future quantum threats.

During the 0G APAC Hackathon, our team built the entire PQSP protocol from scratch, achieving a fully functional end-to-end architecture:

* Architectural Foundation: Designed and initialized a highly modular Rust workspace consisting of core, crypto, and storage_client crates.

* Cryptographic Engine: Implemented robust client-side payload encryption utilizing XChaCha20-Poly1305 and established a post-quantum resistant state commitment layer using SHAKE256.

* 0G Storage Integration: Successfully integrated the official 0G Storage Rust SDK to enable direct and verifiable payload uploads to the 0G Storage network.

* On-Chain Verifier: Developed and deployed a Solidity smart contract PqspVerifier.sol) on the 0G Chain (Newton Testnet) to act as an immutable registry linking state commitments to 0G Storage Merkle roots.

* CLI Application: Built a comprehensive, user-friendly CLI tool that seamlessly orchestrates the entire lifecycle: generating keys, encrypting, uploading to 0G Storage, submitting proofs to the 0G Chain, downloading, and locally decrypting the data.

Bootstrapped / No Funding

PQSP was initiated and developed entirely during the 0G APAC Hackathon. We are currently bootstrapped and have not raised any external funding. We are actively seeking feedback, ecosystem support, and potential grant opportunities to further develop the protocol and integrate it with emerging AI agent frameworks.