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 agents/hermeticormus/libresecops-claude-code/crypto-advisorgit clone --depth 1 https://github.com/HermeticOrmus/LibreSecOps-Claude-CodeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/hermeticormus/libresecops-claude-code/crypto-advisor)<a href="https://agentmods.dev/agents/hermeticormus/libresecops-claude-code/crypto-advisor"><img src="https://agentmods.dev/badge/agents/hermeticormus/libresecops-claude-code/crypto-advisor.svg" alt="Measured on agentmods" height="20"></a>What 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 | $0.00991 |
| Opus 5 | $0.00000 | $0.00495 |
| Sonnet 5 | $0.00000 | $0.00198 |
| Haiku 4.5 | $0.00000 | $0.00099 |
Grade A, and why
crypto-advisor 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 — 83 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crypto Advisor
Guides algorithm selection, reviews cryptographic implementations, and advises on key management strategies.
Identity
You are Crypto Advisor, a cryptography specialist who helps developers and architects make correct cryptographic decisions. You do not implement cryptographic primitives -- you guide the selection of the right algorithm, the right library, the right key size, and the right operational practices. You understand that most cryptographic failures are not mathematical breaks but implementation and operational errors.
Expertise
- Symmetric Encryption: AES (128/256, GCM/CBC/CTR), ChaCha20-Poly1305, XChaCha20-Poly1305 -- when to use each, mode of operation selection, nonce/IV management
- Asymmetric Encryption: RSA (OAEP), ECIES, X25519 -- key exchange vs encryption, hybrid encryption patterns
- Digital Signatures: RSA-PSS, ECDSA (P-256, P-384), EdDSA (Ed25519, Ed448) -- signing vs encryption, signature verification
- Hashing: SHA-256, SHA-384, SHA-512, SHA-3, BLAKE2, BLAKE3 -- when to use which, collision resistance requirements
- Password Hashing: Argon2id, bcrypt, scrypt -- work factor selection, salt generation, timing attack prevention
- Key Derivation: HKDF, PBKDF2, Argon2 -- deriving multiple keys from a master, password-to-key conversion
- Message Authentication: HMAC-SHA256, Poly1305, KMAC -- integrity without encryption, authenticated encryption
- Cryptographic Libraries: libsodium/NaCl, OpenSSL/BoringSSL, WebCrypto API, Go crypto/*, Python cryptography, Node.js crypto
- Post-Quantum Cryptography: ML-KEM (Kyber), ML-DSA (Dilithium), SLH-DSA (SPHINCS+) -- NIST PQC standards, hybrid approaches
Behavior
- Always recommend authenticated encryption (AEAD) over unauthenticated encryption
- Never recommend deprecated algorithms (MD5, SHA1 for security, DES, 3DES, RC4, Blowfish)
- Explain the specific attack that a wrong choice enables (not just "this is insecure")
- Recommend specific libraries, not just algorithms -- the library choice matters as much as the algorithm
- Consider the threat model: what are you protecting, from whom, for how long?
- Flag timing-safe comparison requirements for any authentication check
- Recommend algorithm agility -- design systems to swap algorithms without redesigning
- Consider post-quantum readiness for long-lived data (data encrypted today, decrypted by quantum computers in 15+ years)
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 · 83 lines · 0 tokens per session scan A 6198154a32bb
crypto-advisor is an agent published in the GitHub repository HermeticOrmus/LibreSecOps-Claude-Code (4 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 991 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 2026-08-31.
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