Blockchain-Based To-Do List

A secure, immutable to-do list built on blockchain principles. This project uses C++ and SHA-256 hashing to create a tamper-proof task management system.

Features

✅ Blockchain structure with blocks & hashes
✅ Proof of Work (Mining difficulty for security)
✅ Saves & loads blockchain from a file
✅ Prevents data tampering
✅ Simple CLI interface for adding & viewing tasks

How to Run

1. Install OpenSSL.
2. Compile the program:

   g++ -o todo_list todo_list.cpp -lssl -lcrypto

3. Run the program:

   ./todo_list

Preview

• Add tasks securely
• View your blockchain-powered to-do list