crypto-analysis

Identify cryptographic schemes and decrypt ciphertext with Ciphey and targeted attacks.

7|1|Updated Dec 15, 2025

Search Tags:#rsa #lattice #aes #ciphey #decrypt #xor

Ready to run

npx skills add https://github.com/kiwamizamurai/cctf --skill crypto-analysis

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: crypto-analysis
Source: https://github.com/kiwamizamurai/cctf/tree/main/.claude/skills/crypto-analysis
Command: npx skills add https://github.com/kiwamizamurai/cctf --skill crypto-analysis

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes reference (resource) components.

What problem does it solve?

This Skill helps identify cryptographic schemes, apply attacks, and decrypt ciphertext to recover flags.

Core Features & Use Cases

Auto-decrypt & classify: Use Ciphey to identify and decrypt common schemes.
Crypto attacks: RSA, AES, XOR, and lattice-based techniques with reference templates.
Practical guidance: Step-by-step workflows for attack selection and verification.

Quick Start

Start by auto-decrypting a ciphertext with Ciphey, then apply a targeted attack if needed.