tinycrypt-integration

tinycrypt-integration is a skill for Claude Code, Codex from easyzoom/aix-skills. It costs 42 tokens per session (556 once invoked), scanned A, original, MIT.

An integration guide for using TinyCrypt, a small embedded cryptography library, for operations such as AES, hashing, message authentication, elliptic-curve cryptography, and random numbers.

In plain words
What is it for?
Use it when adding or debugging cryptographic operations on a microcontroller, including encrypted data, authenticated messages, or firmware protection.
Why use it?
It helps avoid unsafe choices around encryption modes, nonces, keys, test vectors, and message formats. It also helps diagnose results that do not match known values or another device.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when adding or debugging cryptographic operations on a microcontroller, including encrypted data, authenticated messages, or firmware protection.

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Install with agentmods
npx agentmods add skills/easyzoom/aix-skills/tinycrypt-integration
Install

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.

Any agent
npx skills add easyzoom/aix-skills --skill tinycrypt-integration
Clone the repo
git clone --depth 1 https://github.com/easyzoom/aix-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for tinycrypt-integration

README.md
[![agentmods](https://agentmods.dev/badge/skills/easyzoom/aix-skills/tinycrypt-integration/github.svg)](https://agentmods.dev/skills/easyzoom/aix-skills/tinycrypt-integration)
Your own site
<a href="https://agentmods.dev/skills/easyzoom/aix-skills/tinycrypt-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/tinycrypt-integration/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tinycrypt-integration

Your own site · 80×15
<a href="https://agentmods.dev/skills/easyzoom/aix-skills/tinycrypt-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/tinycrypt-integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 556 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.00556
Opus 5 $0.00021 $0.00278
Sonnet 5 $0.00008 $0.00111
Haiku 4.5 $0.00004 $0.00056

Measured 8d ago against content hash fc7a39ddee84, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

tinycrypt-integration 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 8d 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.

skills/tinycrypt-integration/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TinyCrypt Integration

Overview

Use this skill to integrate TinyCrypt primitives safely. Cryptographic code needs test vectors, correct modes, nonce/IV discipline, key handling, and explicit threat boundaries before being used in products.

When To Use

Use this skill when:

  • The user wants lightweight crypto primitives on an MCU using TinyCrypt.
  • The task involves AES, SHA, HMAC, CTR, CCM, ECC, RNG, key storage, message authentication, or encrypted firmware/data.
  • Outputs do not match known vectors or peer devices.

Do not use this skill for TLS session integration. Use mbedtls-integration for full TLS. For standalone ECDH/ECDSA operations, use micro-ecc-integration.

First Questions

Ask for:

  • Primitive/mode: AES-CTR, AES-CCM, SHA, HMAC, ECC, or RNG.
  • Protocol or data format consuming the primitive.
  • Key, IV/nonce, tag length, AAD, and message framing policy without exposing secrets.
  • Target MCU/compiler and hardware crypto availability.
  • Known test vector or peer output.

Integration Checklist

  1. Use test vectors first. Validate primitive and mode with public vectors before product payloads.

  2. Define nonce/IV rules. Nonce reuse can break security. Make generation and storage explicit.

  3. Separate encryption and authentication. Know whether the mode authenticates data or only encrypts it.

  4. Protect key material. Avoid logging keys, IV secrets, raw plaintext, or derived secrets.

  5. Handle failures securely. Authentication failure must reject data, not fall back to plaintext.

Common Failures

  • AES mode mismatch with peer.
  • Nonce/IV reused after reboot.
  • Tag length or AAD differs from peer implementation.
  • Hash/HMAC input framing differs.
  • Test code logs secrets or accepts authentication failures.

Verification

Before claiming TinyCrypt works:

  • State primitive/mode, nonce policy, tag length, and framing.
  • Confirm public test vectors pass.
  • Confirm modified ciphertext/tag fails verification.
  • Confirm secrets are not printed or stored insecurely.

Read the full file on GitHub · 79 lines

Changes

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.

  1. 8d ago First seen · 79 lines · 42 tokens per session scan A fc7a39ddee84

Subscribe to this mod's changes

tinycrypt-integration is a skill published in the GitHub repository easyzoom/aix-skills (31 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 556 once invoked, about $0.0002 per session on Opus 5. 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 2026-09-03.

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