CryptoHack — Learning Repository

This repository documents my structured progress while studying cryptography through the CryptoHack platform.
It contains concise notes and Python-based solutions for each challenge, organized by module.

Purpose

• Build strong fundamentals in practical cryptography
• Develop byte-level data handling skills
• Practice systematic cryptanalysis techniques used in CTF environments

Modules

• Introduction — Encoding, bytes manipulation, XOR fundamentals
• Modular Arithmetic — Number theory basics used in public-key cryptography (in progress)
• Symmetric Cryptography — Planned
• Public-Key Cryptography — Planned
• Elliptic Curves — Planned

Repository Structure

Each module directory contains:

• NOTES.md — Consolidated technical notes for the module
• One subdirectory per challenge:
  • solve.py — Implementation used to solve the task
  • README.md — Brief explanation of the approach and concept

Progress Tracking

See PROGRESS.md for completion status across modules.

External Write-up

Detailed learning notes for the Introduction module:

https://medium.com/@0xSa3d/my-first-steps-into-cryptography-with-cryptohack-d062db9fd584

Scope and Policy

• Flags are intentionally omitted.
• Focus is on methodology, data representation, and reasoning rather than tooling.