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.
Install
npx skills add ljagiello/ctf-skills --skill ctf-cryptonpx skills add ljagiello/ctf-skills --skill ctf-crypto -a claude-code -gnpx skills add ljagiello/ctf-skills --skill ctf-crypto -a codex -ggemini skills install https://github.com/ljagiello/ctf-skills.git --path ctf-cryptogh skill install ljagiello/ctf-skills ctf-cryptogit clone --depth 1 https://github.com/ljagiello/ctf-skills /tmp/ljagiello__ctf-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/ljagiello__ctf-skills/ctf-crypto ~/.claude/skills/ctf-crypto # Claude Code
cp -R /tmp/ljagiello__ctf-skills/ctf-crypto ~/.agents/skills/ctf-crypto # Codex, Cursor, Gemini CLI, Copilot, OpenCode