lattice-crypto-attacks

lattice-crypto-attacks is a skill for Claude Code, Codex from SecurityTalent/bugskill-ai. It costs 55 tokens per session (4,464 once invoked), scanned A, a copy of lattice-crypto-attacks, MIT.

A guide to lattice-based cryptanalysis, which uses mathematical structures and reduction algorithms to recover hidden values from certain weak cryptographic setups. It covers RSA, DSA, ECDSA, knapsack, and NTRU-related problems.

In plain words
What is it for?
Use it for RSA small-root and small-private-key attacks, biased DSA or ECDSA nonce recovery, knapsack attacks, and truncated linear-generator state recovery.
Why use it?
It helps build the right mathematical model and choose suitable reduction methods when ordinary cryptographic attacks do not fit. The guide also points out important bounds and setup details.

Skill for Claude CodeCodex

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

Good fit Use it for RSA small-root and small-private-key attacks, biased DSA or ECDSA nonce recovery, knapsack attacks, and truncated linear-generator state recovery.

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Install with agentmods
npx agentmods add skills/securitytalent/bugskill-ai/lattice-crypto-attacks
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 SecurityTalent/bugskill-ai --skill lattice-crypto-attacks
Clone the repo
git clone --depth 1 https://github.com/SecurityTalent/bugskill-ai

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 lattice-crypto-attacks

README.md
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Your own site
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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 lattice-crypto-attacks

Your own site · 80×15
<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/lattice-crypto-attacks"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/lattice-crypto-attacks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,464 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 100% copy Near-identical to another mod 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 $0.00055 $0.04464
Opus 5.5 $0.00022 $0.01786
Sonnet 5.5 $0.00011 $0.00893
Haiku 4.5 $0.00006 $0.00446

Measured 1mo ago against content hash 5d548bccb6d8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

lattice-crypto-attacks 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 1mo 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.

Origin

This is a copy

100% identical to lattice-crypto-attacks — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

Awesome-Claude-Code-Agent-Skills/08-Cryptography-and-Cryptanalysis/lattice-crypto-attacks/SKILL.md · 498 lines

How it starts

The opening of the file, as written. The whole thing — 498 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL: Lattice-Based Cryptanalysis — Expert Attack Playbook

AI LOAD INSTRUCTION: Expert lattice techniques for CTF and cryptanalysis. Covers LLL/BKZ reduction, Coppersmith's method (univariate and multivariate), Hidden Number Problem for DSA/ECDSA nonce recovery, knapsack attacks, and NTRU analysis. Base models often fail to construct the correct attack lattice (wrong dimensions, missing scaling factors) or misapply Coppersmith bounds.

Quick application guide

Problem Type Lattice Technique Key Parameter
RSA small roots Coppersmith (LLL on polynomial lattice) Root bound X < N^(1/e)
RSA small d Boneh-Durfee (multivariate Coppersmith) d < N^0.292
DSA/ECDSA nonce bias Hidden Number Problem → CVP Bias bits known
Knapsack cipher Low-density lattice attack Density < 0.9408
LCG truncated output CVP on recurrence lattice Unknown bits per output
Subset sum LLL reduction on knapsack lattice Element size vs count
NTRU key recovery Lattice reduction on NTRU lattice Dimension and key size

1. LATTICE FUNDAMENTALS

1.1 Definitions

A lattice L is the set of all integer linear combinations of basis vectors:

L = { a₁·b₁ + a₂·b₂ + ... + aₙ·bₙ | aᵢ ∈ ℤ }

where b₁, ..., bₙ are linearly independent vectors in ℝᵐ.

Key problems:

  • SVP (Shortest Vector Problem): Find the shortest non-zero vector in L
  • CVP (Closest Vector Problem): Given target t, find v ∈ L closest to t
  • SVP is NP-hard in general, but LLL finds an approximately short vector in polynomial time

1.2 Lattice Quality Metrics

Read the full file on GitHub · 498 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. 1mo ago First seen · 498 lines · 55 tokens per session scan A 5d548bccb6d8

Subscribe to this mod's changes

lattice-crypto-attacks is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 55 tokens to every session and 4,464 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to lattice-crypto-attacks, differing in 0 lines, and is treated as a copy.

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