Provides cryptography attack techniques for CTF challenges.
ctf-ctf-crypto/SKILL.md
---
name: ctf-crypto
description: Provides cryptography attack techniques for CTF challenges. Use when attacking encryption, hashing, signatures, ZKP, PRNG, or mathematical crypto problems involving RSA, AES, ECC, lattices, LWE, CVP, number theory, Coppersmith, Pollard, Wiener, padding oracle, GCM, key derivation, or stream/block cipher weaknesses.
license: MIT
compatibility: Requires filesystem-based agent (Claude Code or similar) with bash, Python 3, and internet access for tool installation.
allowed-tools: Bash Read Write Edit Glob Grep Task WebFetch WebSearch
metadata:
user-invocable: "false"
---
# CTF Cryptography
Quick reference for crypto CTF challenges. Each technique has a one-liner here; see supporting files for full details with code.
## Prerequisites
**Python packages (all platforms):**
```bash
pip install pycryptodome z3-solver sympy gmpy2 hashpumpy fpylll py_ecc
```
**Linux (apt):**
```bash
apt install hashcat sagemath
```… load the full skill through Skill Me