Bom Explore
cdxgen/cdxgen
Explores and triages a CycloneDX BOM interactively with the cdxi REPL, using built-in commands for dependency trees, licenses, services, cryptographic assets, audit findings, evidence occurrences…
A skill your agent uses when assessing cryptography — TLS/PKI auditing, RSA/ECC key attacks, ECDSA nonce lattice recovery, symmetric/AEAD misuse, JWT/JOSE forgery, hash cracking, post-quantum…
Install Crypto Analysis
$ npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install hypnguyen1209/offensive-claude crypto-analysis --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/crypto-analysis .claude/skills/crypto-analysis && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "crypto-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysis into .claude/skills/crypto-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crypto-analysis", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysisType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install hypnguyen1209/offensive-claude crypto-analysis --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/crypto-analysis .agents/skills/crypto-analysis && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "crypto-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysis into .agents/skills/crypto-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crypto-analysis", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install hypnguyen1209/offensive-claude crypto-analysis --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/crypto-analysis .cursor/skills/crypto-analysis && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "crypto-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysis into .cursor/skills/crypto-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crypto-analysis", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/hypnguyen1209/offensive-claude.git --path skills/crypto-analysis--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install hypnguyen1209/offensive-claude crypto-analysis --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/crypto-analysis .gemini/skills/crypto-analysis && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "crypto-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysis into .gemini/skills/crypto-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crypto-analysis", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install hypnguyen1209/offensive-claude crypto-analysisInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/crypto-analysis .github/skills/crypto-analysis && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "crypto-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysis into .github/skills/crypto-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crypto-analysis", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install hypnguyen1209/offensive-claude crypto-analysis --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/hypnguyen1209/offensive-claude.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/crypto-analysis .opencode/skills/crypto-analysis && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "crypto-analysis" agent skill from https://github.com/hypnguyen1209/offensive-claude/tree/main/skills/crypto-analysis into .opencode/skills/crypto-analysis/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "crypto-analysis", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
crypto-analysis- GitHub stars
- 388
- Token cost
- ~2.2k tokens
- SKILL.md length
- 583 words
- Files
- 14 (incl. scripts, references)
- Skills in repo
- 9
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when assessing cryptography — TLS/PKI auditing, RSA/ECC key attacks, ECDSA nonce lattice recovery, symmetric/AEAD misuse, JWT/JOSE forgery, hash cracking, post-quantum…
- Assessing cryptography — TLS/PKI auditing
- SKILL.md covers When to Activate, Technique Map, Quick Start and OPSEC & Detection (summary), plus 1 more section
- Runs Python scripts from its folder; calls python3
- RSA/ECC key attacks
What it does
Crypto Analysis is an agent skill from hypnguyen1209/offensive-claude. Use when assessing cryptography — TLS/PKI auditing, RSA/ECC key attacks, ECDSA nonce lattice recovery, symmetric/AEAD misuse, JWT/JOSE forgery, hash cracking, post-quantum migration review
Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 15 other files, including scripts and reference files (for example `references/ecc-nonce-attacks.md`, `references/hash-pq.md` and `references/jwt-jose.md`).
It sits in Security, covering Cryptography. The repository describes itself as: Offensive security toolkit for Claude Code covering red team, exploit dev, AD attacks, EDR bypass, mobile pentest. The licence is MIT.
When your agent uses it
- Assessing cryptography — TLS/PKI auditing
- RSA/ECC key attacks
- ECDSA nonce lattice recovery
- Symmetric/AEAD misuse
Example prompts
- “/crypto-analysis”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit a506ad3. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 7 files in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
python3
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Crypto Analysis loads about 2.2k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 51 tokens; SKILL.md has 583 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from hypnguyen1209/offensive-claude at commit a506ad3, republished under its MIT licence (© hypnguyen1209). 583 words, ~2,184 tokens.
Download SKILL.mdSave it as
.claude/skills/crypto-analysis/SKILL.md (or your agent's skills folder). This skill also uses 13 other files; get the full folder from GitHub.- name
- crypto-analysis
- description
- Use when assessing cryptography — TLS/PKI auditing, RSA/ECC key attacks, ECDSA nonce lattice recovery, symmetric/AEAD misuse, JWT/JOSE forgery, hash cracking, post-quantum migration review
- metadata.type
- offensive
- metadata.phase
- analysis
- metadata.tools
- testssl.sh, openssl, hashcat, john, RsaCtfTool, sagemath, jwt_tool, ecdsa-lattice
- metadata.mitre
- T1600, T1600.001, T1557, T1110.002, T1552.004, T1606.001, T1040
- kill_chain.phase
- recon, exploit
- kill_chain.step
- 1, 4
- kill_chain.attck_tactics
- TA0043, TA0006, TA0009
- kill_chain.attck_techniques
- T1600, T1600.001, T1557, T1557.001, T1110.002, T1552.004, T1606.001, T1040
- depends_on
- recon-osint
- feeds_into
- exploit-development, web-pentest, network-attack
Cryptographic Analysis
When to Activate
- Auditing TLS/SSL/SSH configurations and X.509 PKI (cipher suites, downgrade, protocol flaws)
- Reviewing crypto implementations in source code or captured traffic
- Attacking weak RSA/ECC keys (CTF and real-world weak-key hygiene)
- Recovering ECDSA/DSA private keys from reused or biased nonces (lattice/HNP)
- Exploiting symmetric/AEAD misuse: padding oracles, GCM nonce reuse, key-commitment
- Forging JWT/JOSE tokens (algorithm confusion, none, jwk/jku/kid injection)
- Cracking password hashes and grading KDF strength
- Assessing post-quantum readiness ("harvest now, decrypt later" exposure)
Technique Map
| Technique | ATT&CK | CWE | Reference | Script |
|---|---|---|---|---|
| TLS cipher/protocol downgrade audit | T1600.001 | CWE-326 | references/tls-pki-audit.md | scripts/tls_audit.py |
| Terrapin SSH prefix truncation (CVE-2023-48795) | T1557 | CWE-222 | references/tls-pki-audit.md | scripts/tls_audit.py |
| Marvin/Bleichenbacher RSA timing oracle | T1600 | CWE-208 | references/tls-pki-audit.md | scripts/tls_audit.py |
| X.509 / CT-log shadow-asset discovery | T1589 | CWE-295 | references/tls-pki-audit.md | scripts/tls_audit.py |
| RSA weak-key factoring (Fermat/Wiener/common-modulus) | T1600 | CWE-326 | references/rsa-attacks.md | scripts/rsa_attack.py |
| Coppersmith partial-key & ROCA (CVE-2017-15361) | T1600 | CWE-310 | references/rsa-attacks.md | scripts/rsa_attack.py |
| Hastad broadcast / batch-GCD | T1600 | CWE-326 | references/rsa-attacks.md | scripts/rsa_attack.py |
| ECDSA nonce reuse key recovery | T1552.004 | CWE-323 | references/ecc-nonce-attacks.md | scripts/ecdsa_lattice.py |
| Biased-nonce lattice/HNP (Minerva, PuTTY CVE-2024-31497) | T1552.004 | CWE-1241 | references/ecc-nonce-attacks.md | scripts/ecdsa_lattice.py |
| Psychic signature (0,0) (CVE-2022-21449) | T1606.001 | CWE-347 | references/ecc-nonce-attacks.md | scripts/ecdsa_lattice.py |
| CBC padding oracle (byte-by-byte decrypt) | T1040 | CWE-209 | references/symmetric-aead.md | scripts/padding_oracle.py |
| AES-GCM nonce reuse "forbidden attack" | T1040 | CWE-323 | references/symmetric-aead.md | scripts/gcm_nonce_reuse.py |
| AEAD key-commitment / invisible salamanders / partitioning oracle | T1606 | CWE-347 | references/symmetric-aead.md | scripts/gcm_nonce_reuse.py |
| JWT algorithm confusion RS256→HS256 (CVE-2024-54150) | T1606.001 | CWE-347 | references/jwt-jose.md | scripts/jwt_forge.py |
| JWT alg=none / jwk / jku / kid injection | T1606.001 | CWE-347 | references/jwt-jose.md | scripts/jwt_forge.py |
| Hash identification & GPU cracking | T1110.002 | CWE-916 | references/hash-pq.md | scripts/hash_triage.py |
| Weak KDF / fast-hash password storage | T1110.002 | CWE-916 | references/hash-pq.md | scripts/hash_triage.py |
| Post-quantum / HNDL exposure review | T1600 | CWE-327 | references/hash-pq.md | scripts/tls_audit.py |
Quick Start
# 0. TLS/PKI posture in one shot (downgrade, ROBOT, SWEET32, Terrapin, cert/CT)
python3 scripts/tls_audit.py target.com:443 --ssh target.com:22 --ct --json out.json
testssl.sh --full --robot --sweet32 https://target.com # cross-check with the canonical tool
# 1. RSA weak-key triage on a captured public key
python3 scripts/rsa_attack.py --pubkey server.pem --ct ciphertext.b64 --auto
# tries Fermat (p~=q), Wiener (small d), batch-GCD/common-modulus, ROCA fingerprint
# 2. ECDSA key recovery from a signature corpus (reuse or bias)
python3 scripts/ecdsa_lattice.py recover sigs.json --curve secp256r1 --known-msb 4
# reuse: needs 2 sigs w/ same r; bias: ~256-1200 sigs depending on leak
# 3. Symmetric/AEAD misuse
python3 scripts/padding_oracle.py --url https://t/dec --ct $CT --block 16 # CBC oracle
python3 scripts/gcm_nonce_reuse.py forbidden ct1.bin ct2.bin --nonce $N # recover H + forge
# 4. JWT forgery chain
python3 scripts/jwt_forge.py confusion --pubkey jwt_pub.pem --claims '{"role":"admin"}'
python3 scripts/jwt_forge.py none --claims '{"sub":"admin"}'
# 5. Hash triage + crack plan
python3 scripts/hash_triage.py hashes.txt # identify + emit hashcat -m / john format
hashcat -m 22000 capture.hc22000 wl.txt -r rules/best64.ruleOPSEC & Detection (summary)
| Technique | Telemetry / IOC | Detection (Sigma/EDR) | OPSEC note |
|---|---|---|---|
| TLS scanning / testssl | Burst of handshakes, many cipher renegotiations, malformed ClientHellos | NIDS: high TLS alert rate from one src; Zeek ssl.log anomalous cipher offers | Rate-limit, spread across source IPs; passive cert/CT recon leaves no target-side trace |
| Marvin/ROBOT oracle probing | ~10^4–10^6 RSA decrypts, repeated malformed pre-master/CMS | WAF/IDS: spike of TLS decrypt errors, identical-size payloads | Extremely loud; only against authorized hosts; use minimal query budgets |
| Terrapin MitM | Injected SSH_MSG_IGNORE, sequence-number gap at NEWKEYS | SSH server logs kex mismatch; netflow showing on-path device | Requires active MitM; detectable by strict-kex peers; abort if kex-strict present |
| ECDSA nonce harvesting | Bulk signature collection (Git, TLS, SSH, blockchain) | Mostly offline — no target telemetry once sigs captured | Collection is passive; recovery is offline; rotate-key advice in report |
| CBC padding oracle | Thousands of decrypt requests, alternating valid/invalid padding | Web logs: ~256×blocks requests to one endpoint; Sigma on 4xx burst | Very noisy (256×blocks×msgs); throttle, randomize timing |
| GCM nonce reuse / partitioning | Repeated (nonce,key) pairs; multi-key ciphertext blobs | App crypto audit; flag reused IVs in logs | Forbidden-attack math is offline once two ciphertexts captured |
| JWT forgery | Anomalous alg, external jku/x5u fetch, all-zero ES signature | Sigma: JWT with alg:none/HS after RS expected; egress to attacker JWKS URL | Each forged token is a single request; minimal noise |
| Hash cracking | None on target (offline) | N/A unless online spray (then T1110) | Offline; protect loot at rest; never spray live without scope |
Show full SKILL.md (109 more words)Show less
Deep Dives
- references/tls-pki-audit.md — TLS/SSL/SSH posture: cipher/protocol downgrade, Terrapin (CVE-2023-48795), Marvin/Bleichenbacher (CVE-2022-4304, CVE-2024-2236), SWEET32/DROWN/Logjam/POODLE, X.509 and Certificate-Transparency analysis.
- references/rsa-attacks.md — Weak-key factoring: Fermat, Wiener, common modulus, Hastad broadcast, Coppersmith partial-key, batch-GCD, ROCA (CVE-2017-15361); RsaCtfTool / cado-nfs / SageMath workflow.
- references/ecc-nonce-attacks.md — ECDSA/DSA nonce reuse, biased-nonce lattice/HNP recovery (Minerva, PuTTY CVE-2024-31497), invalid-curve attacks, psychic signatures (CVE-2022-21449).
- references/symmetric-aead.md — Block-cipher mode misuse: ECB detection, CBC padding oracle, CTR/GCM nonce reuse (forbidden attack), AEAD key-commitment / invisible salamanders / partitioning oracles.
- references/jwt-jose.md — JWT/JOSE token forgery: algorithm confusion (CVE-2024-54150), alg=none, jwk/jku/x5u/kid injection, weak-secret cracking, library-level CVE landscape.
- references/hash-pq.md — Hash identification, modern GPU cracking economics (RTX 40/50-series), KDF strength grading, and post-quantum migration / "harvest now, decrypt later" assessment (ML-KEM/ML-DSA, hybrid TLS, crypto-agility).
© hypnguyen1209, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 13 other files (scripts, references) in skills/crypto-analysis of hypnguyen1209/offensive-claude.
- SKILL.md
- references/ecc-nonce-attacks.md
- references/hash-pq.md
- references/jwt-jose.md
- references/rsa-attacks.md
- references/symmetric-aead.md
- references/tls-pki-audit.md
- scripts/ecdsa_lattice.py
- scripts/gcm_nonce_reuse.py
- scripts/hash_triage.py
- scripts/jwt_forge.py
- scripts/padding_oracle.py
- scripts/rsa_attack.py
- scripts/tls_audit.py
Open the folder on GitHubat commit a506ad3
Compare with similar skills
Crypto Analysis next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Crypto Analysis this skillhypnguyen1209/offensive-claude | 388 | — | ~2.2k | Automated safety check: Pass | MIT | |
| Bom Explorecdxgen/cdxgen | 1.1k | — | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| Webcrypt MCPputervision/state-memory-mcp | 114 | — | ~847 | Automated safety check: Pass | MIT | |
| Security Reviewvalory-xyz/open-autonomy | 129 | — | ~11k | Automated safety check: Notes | Apache-2.0 | |
| Hashcat Password Recovery WorkflowAgentSecOps/SecOpsAgentKit | 220 | 1 repos | ~3.3k | Automated safety check: Notes | Custom licence | |
| Altllm Portal Authinternet-court/internet-court-skill | 6.5k | 1 repos | ~632 | Automated safety check: Pass | ISC |
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Categories
Questions about Crypto Analysis
What does Crypto Analysis do?
A skill your agent uses when assessing cryptography — TLS/PKI auditing, RSA/ECC key attacks, ECDSA nonce lattice recovery, symmetric/AEAD misuse, JWT/JOSE forgery, hash cracking, post-quantum…. Crypto Analysis is an agent skill from hypnguyen1209/offensive-claude.
When should I use Crypto Analysis?
Crypto Analysis fits situations like: assessing cryptography — TLS/PKI auditing; RSA/ECC key attacks; ECDSA nonce lattice recovery; symmetric/AEAD misuse.
How do I install Crypto Analysis in Claude Code?
Run `npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a claude-code`. Or copy the skill folder (skills/crypto-analysis in hypnguyen1209/offensive-claude) into .claude/skills/crypto-analysis in your project. Claude Code loads it when a task matches its description.
How do I install Crypto Analysis in Codex?
Run `npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a codex`. Or copy the skill folder (skills/crypto-analysis in hypnguyen1209/offensive-claude) into .agents/skills/crypto-analysis in your project. Codex loads it when a task matches its description.
Can I use Crypto Analysis in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hypnguyen1209/offensive-claude --skill crypto-analysis -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/crypto-analysis, .gemini/skills/crypto-analysis, .github/skills/crypto-analysis and .opencode/skills/crypto-analysis in your project.
What does Crypto Analysis need to run?
Going by SKILL.md and its folder, Crypto Analysis needs Python for the scripts in its folder and the command-line tools its instructions call (python3). Our summary lists: Python 3.
Does Crypto Analysis access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Crypto Analysis safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Crypto Analysis use?
Crypto Analysis is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Crypto Analysis use?
About 2.2k tokens (SKILL.md is roughly 8.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 11k tokens, read only when the agent opens those files.
What are the alternatives to Crypto Analysis?
Skills that share tags, products or a category with Crypto Analysis: Bom Explore (cdxgen/cdxgen, 1.1k stars), Webcrypt MCP (putervision/state-memory-mcp, 114 stars), Security Review (valory-xyz/open-autonomy, 129 stars) and Hashcat Password Recovery Workflow (AgentSecOps/SecOpsAgentKit, 220 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Crypto Analysis?
hypnguyen1209 (a GitHub user) maintains it in hypnguyen1209/offensive-claude, which has 388 GitHub stars. The repository holds 9 skills in this directory. The repository was last updated on September 28, 2026.
Source: hypnguyen1209/offensive-claude on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.