Conditional Autonomous Data Releasing Method. ARADSTERDAM DAO's Secure Solution

Autonomous Data Release Method

Developed by ARADSTERDAM DAO


Introduction

  • Objective: Develop a secure and autonomous method to release data to the public unless specific actions are performed within a defined timeframe.
  • Key Components:
    • Post-Quantum Encryption
    • Shamir’s Secret Sharing
    • Decentralized Storage (Arweave, IPFS)
    • Privacy-Oriented Smart Contracts (Ethereum)
    • Chainlink Oracles for Automation

Overview

  1. Post-Quantum Encryption: Ensures encryption is resistant to quantum computing threats.
  2. Shamir’s Secret Sharing: Secures AES keys with threshold encryption for decentralization.
  3. Decentralized Storage: Utilizes Arweave and IPFS for immutable and censorship-resistant data storage.
  4. Privacy-Oriented Smart Contracts: Deploys on Ethereum with zk-SNARKs for privacy-preserving computations.
  5. Chainlink Oracles: Automates triggers (e.g., login status) for key retrieval and data release.

Detailed Implementation Steps

Step 1: Encrypt Data and AES Key

  • Encrypt Data with AES-256:

    openssl enc -aes-256-cbc -salt -in data.txt -out data.enc -k secretkey
    
  • Shard AES Key with Shamir’s Secret Sharing:

    from secretsharing import SecretSharer
    
    # Split AES key into shares
    shares = SecretSharer.split_secret('secretkey', 5, 3)  # 5 shares, 3 required for reconstruction
    for i, share in enumerate(shares):
        with open(f'share_{i+1}.txt', 'w') as f:
            f.write(share)
    

Step 2: Upload Encrypted Data

  • Upload to Arweave:

    arweave upload data.enc
    
  • Upload to IPFS:

    ipfs add data.enc
    

Step 3: Deploy Privacy-Oriented Smart Contract

  • Example Solidity Contract:
    // SPDX-License-Identifier: MIT
    pragma solidity ^0.8.0;
    
    import "@openzeppelin/contracts/access/Ownable.sol";
    import "@openzeppelin/contracts/utils/Counters.sol";
    import "./Verifier.sol"; // zk-SNARK verifier contract
    
    contract AutonomousDataRelease is Ownable {
        using Counters for Counters.Counter;
    
        struct Document {
            string arweaveCID;
            string ipfsHash;
            uint256 timestamp;
            string[] keyShares;
        }
    
        Counters.Counter private _documentIds;
        mapping(uint256 => Document) private _documents;
        Verifier private verifier;
    
        event DocumentPublished(uint256 indexed documentId, string arweaveCID, string ipfsHash, uint256 timestamp);
    
        constructor(address verifierAddress) {
            verifier = Verifier(verifierAddress);
        }
    
        function addDocument(
            string memory arweaveCID,
            string memory ipfsHash,
            string[] memory keyShares,
            uint[2] memory a,
            uint[2][2] memory b,
            uint[2] memory c,
            uint[1] memory input
        ) public onlyOwner {
            require(verifier.verifyProof(a, b, c, input), "Invalid proof");
    
            _documentIds.increment();
            uint256 documentId = _documentIds.current();
            _documents[documentId] = Document({
                arweaveCID: arweaveCID,
                ipfsHash: ipfsHash,
                timestamp: block.timestamp,
                keyShares: keyShares
            });
    
            emit DocumentPublished(documentId, arweaveCID, ipfsHash, block.timestamp);
        }
    
        function getDocument(uint256 documentId) public view returns (string memory, uint256, string memory, string memory, string[] memory) {
            Document storage doc = _documents[documentId];
            return (doc.arweaveCID, doc.ipfsHash, doc.timestamp, doc.keyShares);
        }
    }
    

Step 4: Upload Encrypted Key Shares to Blockchain

  • Procedure to Encrypt and Upload Key Shares:

    from Crypto.Cipher import AES
    import base64
    
    # Function to pad the key shares
    def pad(s):
        return s + (32 - len(s) % 32) * chr(32 - len(s) % 32)
    
    key = b'Sixteen byte key'  # AES encryption key (must be 16, 24, or 32 bytes)
    for i in range(1, 6):
        with open(f'share_{i}.txt', 'r') as f:
            share = f.read()
            cipher = AES.new(key, AES.MODE_CBC)
            ct_bytes = cipher.encrypt(pad(share).encode('utf-8'))
            iv = base64.b64encode(cipher.iv).decode('utf-8')
            ct = base64.b64encode(ct_bytes).decode('utf-8')
            encrypted_share = iv + ct
            with open(f'encrypted_share_{i}.txt', 'w') as ef:
                ef.write(encrypted_share)
    
  • Upload Encrypted Key Shares to Ethereum:

    function storeKeyShares(string[] memory encryptedKeyShares) public onlyOwner {
        for (uint i = 0; i < encryptedKeyShares.length; i++) {
            // Store each encrypted key share in the smart contract
            _keyShares.push(encryptedKeyShares[i]);
        }
    }
    

Step 5: Automate with Chainlink Oracles

  • Register Contract with Chainlink Keepers:
    • Automate key retrieval and data release based on predefined triggers (e.g., login activity).

Triggers to Stop Decryption

  1. Login Activity:

    • Require periodic login to halt data release.
    • Chainlink oracles monitor login status; absence triggers decryption.
  2. Multi-Signature Approval:

    • Require multiple approvals to stop data release.
    • Smart contract verifies signatures before halting decryption.
  3. External Event:

    • Trigger based on specific blockchain events or transactions.
    • Automated by Chainlink oracles for timely intervention.

Secure Storage of Keys on Blockchain

  • Encryption: AES-256 encrypts the shares before upload.
  • On-Chain Storage: Upload encrypted shares to Ethereum as strings.
  • Access Control: Only owner or authorized parties can access and retrieve key shares.

Security and Privacy Features

  • Robust Encryption: AES-256 for data and Shamir’s Secret Sharing for AES key.
  • Decentralized Storage: Arweave and IPFS ensure data immutability and censorship-resistance.
  • Privacy-Preserving Smart Contracts: Ethereum with zk-SNARKs enables confidential transactions.
  • Automated Execution: Chainlink Oracles automate data release triggers securely.

Example Use Case

  • Scenario: Release encrypted data publicly if a user does not log in within a specified timeframe.
  • Implementation: Chainlink oracles monitor login status; upon failure to log in, smart contract retrieves key shares and releases data.

Conclusion

The Autonomous Data Release Method developed by ARADSTERDAM DAO ensures secure, automated, and privacy-focused data release leveraging blockchain, decentralized storage, and smart contracts. By integrating advanced encryption, decentralized infrastructure, and automated triggers, the method provides a robust solution for managing and releasing sensitive data autonomously.


Questions?


This presentation provides a technical overview of the method, emphasizing security, automation, and privacy in data release scenarios managed by ARADSTERDAM DAO.