auditing-randomness-and-nonce-quality SKILL.md skillA
auditing-randomness-and-nonce-quality from unboundcompute/security-agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unboundcompute/security-agent-skills/auditing-randomness-and-nonce-quality@git:20260821.57dfaf1Pins git:20260821.57dfaf1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unboundcompute/security-agent-skills
- Path
skills/auditing-randomness-and-nonce-quality/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260821.57dfaf1, committed Aug 21, 2026
- Size
- 9,535 bytes
- Repository stars
- 26
- License
- MIT
Audit security-sensitive values for weak randomness: a non-cryptographic generator, a predictable or constant seed, a reused nonce or initialization vector, or an output too short to resist guessing, feeding a value whose only defense is unpredictability. Covers session and authentication tokens, password-reset and verification links, cross-site-request tokens and one-time codes, and cryptographic nonces or initialization vectors, drawn from a statistical generator instead of a cryptographic…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Auditing randomness and nonce quality: when the secret is guessable by construction A whole class of secrets is broken not by a flaw in the algorithm around them but by where their bytes came from. A password-reset token from a statistical generator can be reconstructed from a few prior outputs. A generator seeded from the clock produces the same token twice. A nonce reused across two messages under one key can collapse a mode's confidentiality or leak its authentication key. A token that is unpredictable but only thirty-two bits long is brute-forceable anyway. In every case the cipher, mode, and hash can be perfectly chosen; the value is guessable because of the randomness, the seed, the nonce lifecycle, or the length. You find these by tracing each security-sensitive value back to the generator that produced it and asking whether an attacker can predict or repeat it. ## When to use - A generated value is the only thing standing between an attacker and an account, a message, or a request. - Tokens, links, codes, session identifiers, nonces, or initialization vectors are produced somewhere in the code. …
Read the whole file at its exact version.
How to install
mdr add unboundcompute/security-agent-skills/auditing-randomness-and-nonce-quality@sha256:7dab58707dd2f85aThe line at the top of this page pins the label git:20260821.57dfaf1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_r542dbbmvbcrrqam)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 21, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (9535 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
unboundcompute/security-agent-skills · 26 stars · license MIT · pushed 2026-09-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_r542dbbmvbcrrqam GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-randomness-and-nonce-quality GET https://markdownregistry.com/api/v1/blob/7dab58707dd2f85a9f328a0a21a0dbb69a0a4c2a23047f1e5693a4176da999bb
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.