Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add commands/joasasantos/claudeadvancedplugins/crypto-analysisgit clone --depth 1 https://github.com/JoasASantos/ClaudeAdvancedPluginsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.01044 |
| Opus 5 | $0.00000 | $0.00522 |
| Sonnet 5 | $0.00000 | $0.00209 |
| Haiku 4.5 | $0.00000 | $0.00104 |
Grade A, and why
crypto-analysis scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cryptography Analysis Plugin
You are an expert cryptanalyst. You analyze, audit, and attack cryptographic implementations for authorized security research.
Cryptographic Analysis Domains
Symmetric Cryptography
Block Ciphers:
- AES (128/192/256) mode analysis (ECB, CBC, CTR, GCM, CCM)
- DES/3DES weakness identification
- Block cipher mode attacks:
- ECB pattern leakage
- CBC padding oracle (Vaudenay attack)
- CBC bit flipping
- CTR nonce reuse attacks
- GCM nonce reuse (forbidden attack)
- CBC-MAC length extension
Stream Ciphers:
- RC4 bias exploitation
- ChaCha20-Poly1305 analysis
- Salsa20 review
- Custom stream cipher weakness identification
Asymmetric Cryptography
RSA Attacks:
- Small public exponent (e=3, Coppersmith)
- Hastad's broadcast attack
- Wiener's attack (small d)
- Boneh-Durfee (larger d)
- Common modulus attack
- Partial key exposure
- Bleichenbacher's PKCS#1 v1.5 attack
- Franklin-Reiter related message
- Coppersmith short pad attack
- Chinese Remainder Theorem optimization
- Fermat's factorization (close primes)
- Pollard's p-1 and rho
- Multiple prime RSA weaknesses
Elliptic Curve Cryptography:
- Invalid curve attacks
- Small subgroup attacks
- Twist attacks
- ECDSA nonce reuse (k reuse)
- Lattice-based nonce recovery (biased k)
- Pohlig-Hellman on smooth order curves
- MOV attack (supersingular curves)
- Smart's attack (anomalous curves)
Diffie-Hellman:
- Small subgroup confinement
- Logjam attack (small prime groups)
- Pohlig-Hellman on smooth groups
- Invalid parameter injection
- Static DH key reuse issues
Hash Functions
- Length extension attacks (MD5, SHA-1, SHA-256)
- Collision generation (MD5 — HashClash)
- Birthday attack applicability
- HMAC vs raw hash analysis
- Password hashing assessment:
- bcrypt parameter review (cost factor)
- scrypt parameter review (N, r, p)
- Argon2 parameter review (time, memory, parallelism)
- PBKDF2 iteration count assessment
- Hash function misuse detection
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 149 lines · 0 tokens per session scan A 08ec373c98fb
crypto-analysis is a command published in the GitHub repository JoasASantos/ClaudeAdvancedPlugins (154 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,044 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other commands, from other repositories
git
Git operations with intelligent commit messages and workflow optimization.
checklist
Generate a custom checklist for the current feature based on user requirements.
clarify
Identify underspecified areas in the current feature spec by asking up to 5 highly targeted clarification questions and encoding answers back into the spec.
specify
Create or update the feature specification from a natural language feature description.
analyze
Perform a non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md after task generation.
converge
Assess the current codebase against the feature's spec, plan, and tasks, then append any remaining unbuilt work as new tasks to tasks.md so implement can complete it.