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Breaks cryptographic systems and decrypts ciphertext. Use when working with RSA, AES, XOR, classical ciphers, hash functions, or when challenge involves encryption, decryption, keys, or mathematical crypto attacks.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Analyzes binary files for vulnerabilities and develops exploits. Use when working with ELF/PE executables, pwn challenges, buffer overflow, heap exploitation, ROP chains, format string bugs, or shellcode development.
Extracts hidden data from files and analyzes forensic artifacts. Use when working with images, memory dumps, disk images, steganography, file carving, or when searching for hidden flags in files.
Reverses and exploits mobile applications. Use when working with Android APK files, iOS IPA files, mobile app reversing, Frida hooking, or app security analysis challenges.
Analyzes network traffic and exploits protocols. Use when working with PCAP files, Wireshark captures, packet analysis, protocol exploitation, traffic forensics, or data exfiltration detection.
Gathers intelligence from public sources. Use when searching for usernames, geolocating images, investigating social media, analyzing domains, or solving information gathering challenges.
Escapes Python sandbox restrictions. Use when working with restricted Python eval/exec environments, sandbox escapes, filtered input challenges, or Python jail challenges.
| name | crypto-analysis |
| description | Breaks cryptographic systems and decrypts ciphertext. Use when working with RSA, AES, XOR, classical ciphers, hash functions, or when challenge involves encryption, decryption, keys, or mathematical crypto attacks. |
| allowed-tools | Bash, Read, Write, Grep, Glob |
Progress:
- [ ] Try Ciphey auto-decrypt first
- [ ] Identify crypto type (RSA/AES/XOR/classical)
- [ ] Check for known weaknesses
- [ ] Implement attack
- [ ] Decrypt flag
ciphey -t "ENCODED_TEXT" # Auto-detects and decrypts
ciphey -f encrypted.txt # From file
| Pattern | Crypto Type | Reference |
|---|---|---|
n, e, c variables | RSA | reference/rsa-attacks.md |
| 16/32 byte key, IV | AES | reference/aes-attacks.md |
| XOR operations | XOR/Stream | reference/classical.md |
| Polynomial mod | Lattice | reference/lattice.md |
├── e small (≤5)? → Direct eth root
├── e very large? → Wiener's Attack
├── Multiple n,e,c? → Hastad's Broadcast
├── Same n, diff e? → Common Modulus
├── GCD(n1,n2) > 1? → Common Factor
├── p ≈ q? → Fermat Factorization
├── dp/dq leaked? → Partial Key Recovery
└── Default → FactorDB / yafu
Full implementations: reference/rsa-attacks.md
# Auto-decrypt
ciphey -t "text"
# XOR analysis
xortool encrypted.bin
xortool -c 20 encrypted.bin # Expect spaces
# Factor large n
yafu "factor(<n>)"
# RSA tool
python3 RsaCtfTool.py -n <n> -e <e> --uncipher <c>
# Lattice (SageMath)
sage solve.sage