Blockchain based Audit Log (Proof of Concept)

This repository contains a Proof of Concept (PoC) for a blockchain-based
audit log implemented in Java. The project demonstrated how blockchain technology
can be utilized to create an immutable, secure and transparentlogging system

Proof of Work in an Audit Log

Proof of Work (PoW) is a mechanism used in blockchain systems to ensure that
adding a new block to the chain requires computational effort. This prevents malicious
actors from easily tampering with the chain and ensures the integrity of the
blockchain. In this repository, a simplified version of PoW is implemented to simulate
the concept and demonstrate how it can be applied to an audit log.

Implementation

• Each block contains a nonce, a number that must be calculated to satisfy a predefined
  condition (e.g., the hash of the block must start with a certain number of zeros).
• The PoW process involves incrementing the nonce and recalculating the hash until
  the condition is met.
• This computational effort makes it infeasible to manipulate blocks without significant resources.

While the PoW in this project is simplified and does not involve actual distributed mining, it demonstrates the foundational concept and how it could be adapted for securing audit logs.

Test Coverage

• Tests cover block creation, blockchain integrity, and tamper detection.
• Ensure all tests pass to verify the system's integrity.

License

This project is licensed under the MIT License. See the LICENSE file for details.