Ghost Trust Ledger

A blockchain-powered trust ledger that securely verifies, timestamps, and preserves system data—making digital evidence tamper-proof, transparent, and auditable.

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About the Project – Ghost Trust Ledger

Inspiration

Ghost Trust Ledger was inspired by real-world cybersecurity and red-teaming scenarios where logs, system events, and digital evidence can be altered or erased after an incident. During vulnerability assessments and security labs, we noticed that even well-secured systems often rely on centralized log storage, which creates a single point of failure.
This motivated us to build a tamper-proof trust layer using blockchain—where once data is recorded, it becomes immutable and verifiable.

What it does

Ghost Trust Ledger is a blockchain-backed digital evidence and verification system that:

  • Collects system or event data from a secure agent (EXE)
  • Hashes and timestamps the data
  • Stores cryptographic proofs on the blockchain
  • Enables anyone with permission to verify data integrity later

In simple terms, it ensures:

“If the data was changed, it will be detected.”

How we built it

The project uses a hybrid off-chain + on-chain architecture:

  1. Client Agent (EXE)

    • Captures system or event data
    • Sends data securely to the backend

  2. Backend Server (Node.js + Express)

    • Validates incoming payloads
    • Generates cryptographic hashes
    • Handles secure communication and transaction logic

  3. Blockchain Layer (Ethereum Testnet – Sepolia)

    • Stores hashes, timestamps, and device identifiers
    • Provides immutability and public verifiability

Data integrity is ensured using cryptographic hashing: [ H = \text{SHA-256}(D) ] where (D) is the original data and (H) is the immutable proof stored on-chain.

Challenges we ran into

  • Gas and storage limitations on blockchain
  • Private key management and wallet security
  • Handling failed or delayed blockchain transactions
  • Designing a secure bridge between off-chain systems and on-chain storage
  • Ensuring data authenticity while preventing replay or spoofing attacks

Each challenge required careful architectural and security-focused decisions.

Accomplishments that we're proud of

  • Successfully built a working end-to-end pipeline from EXE → Backend → Blockchain
  • Achieved tamper-proof logging and verification
  • Implemented secure hashing and timestamping
  • Designed a scalable and modular architecture
  • Applied real cybersecurity and blockchain concepts to a practical problem

What we learned

  • How to integrate blockchain with real-world systems
  • Trade-offs between decentralization, performance, and cost
  • Secure API and backend design principles
  • Importance of threat modeling in system architecture
  • How immutability strengthens digital trust

What's next for Ghost Trust Ledger

  • Role-based access control (RBAC) for log verification
  • Off-chain encrypted storage (IPFS / cloud) with on-chain hash anchoring
  • Smart contract–based verification dashboards
  • Integration with SIEM and SOC tools
  • Transition from testnet to production-ready private or consortium blockchain

Ghost Trust Ledger aims to become a foundational trust layer for digital forensics, cybersecurity auditing, and compliance-driven environments.

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