ljagiello/ctf-skills · ctf-crypto/SKILL.md

ctf-crypto skillA

ctf-crypto is agent-read markdown (skill) from ljagiello/ctf-skills: 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..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add ljagiello/ctf-skills/ctf-crypto@git:20260912.61c2efe
Exact content
mdr add ljagiello/ctf-skills/ctf-crypto@sha256:3f73227dbf2b12c0

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_u42qk5tnkhgdxkcr.svg)](https://markdownregistry.com/a/art_u42qk5tnkhgdxkcr)

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Versions

versioncommittedcommitsizeaudit
git:20260912.61c2efe latest2026-09-12 61c2efe 42,044 BA view · diff
git:20260417.b80ec3f2026-04-17 b80ec3f 38,930 BA view · diff
git:20260414.2fddcde2026-04-14 2fddcde 38,918 BA view · diff
git:20260413.730d82f2026-04-13 730d82f 37,951 BA view · diff
git:20260403.008fb992026-04-03 008fb99 37,685 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (42044 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

ljagiello/ctf-skills · 3,261 stars · license MIT · pushed 2026-09-12 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_u42qk5tnkhgdxkcr
GET https://markdownregistry.com/api/v1/resolve?ref=ljagiello/ctf-skills/ctf-crypto
GET https://markdownregistry.com/api/v1/blob/3f73227dbf2b12c063d8df68a207430dfe1113f290a9da0fe2715f73fc74259c