pentest-ctf-crypto
Cryptography tools for solving CTF challenges involving ciphers, hashing, and weak encryption.
Skill by jd-opensource
Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/jd-opensource-pentest-ctf-crypto
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: security, finance
Reviews
Write a reviewNo reviews yet. Installed it? Reviews come from verified installers only. How reviews work
Permissions
What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.
- Tools
- No tools found
- Secrets
- None asked for
- Install scripts
- None found
Network hosts it talks to 1
codeload.github.com· found in install command
Files it touches
~/.claude/skills/pentest-ctf-crypto
What's inside
- Skill name
pentest-ctf-crypto- Description
- Cryptography tools for solving CTF challenges involving ciphers, hashing, and weak encryption.
- License
- Apache-2.0
- Instructions
- 17 lines in SKILL.md · view on GitHub
Files (3)
- SKILL.md
- tools.md · references/
- workflows.md · references/
SKILL.md (first lines)
# Pentest CTF Crypto ## Purpose Analyze and break cryptographic implementations, including classical ciphers, RSA weak keys, and hash extensions. ## Core Workflow 1. **Cipher Identification**: Identify the type of encryption or encoding used (e.g., Base64, Caesar, RSA). 2. **Classical Cracking**: Brute-force or analyze frequency for classical ciphers using `ciphey` or online tools. 3. **RSA Attacks**: Check for common RSA weaknesses (small e, small factors) using `RsaCtfTool`. 4. **Hash Analysis**: Identify hash types and attempt cracking or length extension attacks using `hashcat` or `hashpump`. 5. **Math/Primes**: Solve mathematical problems related to cryptography using `sagemath`. ## References - `references/tools.md` - `references/workflows.md`
From jd-opensource/JoySafeter, Apache-2.0.
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Signals
- Stars
- 315
- Forks
- 56
- Open issues
- 17
- Last commit (this folder)
- Feb 11, 2026 (8 months ago)
- Last release
- Jul 2, 2026 (3 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- Apache-2.0
- Repository
- github.com/jd-opensource/JoySafeter
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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Cite this page
pentest-ctf-crypto skill. Agent Mart. https://agentmart.dev/skills/jd-opensource-pentest-ctf-crypto (last updated 2026-10-24)