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Harden Ble

Category: Security  ·  Sub-category: network-security  ·  Last updated:
GATT access control and pairing hardening for Bluetooth Low Energy devices that treat the radio link as the trust boundary: privileged GATT characteristics left open without authentication or encryption, Just Works pairing with no MITM protection, and LE Legacy Pairing with a recoverable key (MITRE ATT&CK T1557, T1040, T1011.001). The signal is link and attribute layer: HCI and btsnoop traces, the SMP pairing exchange, ATT error responses, BlueZ bluetoothd journald records, and Windows Bluetooth ETW channels. The skill gives the GATT permission model to enforce, the pairing settings to mandate (LE Secure Connections, 16-byte keys), defender-view signals, a hunt, and framework-mapped hardening. Use when designing or reviewing a BLE GATT server, hardening pairing on an IoT device, smart lock, or BLE gateway, triaging an unbonded peer that walked your GATT tree, or hunting for Just Works and LE Legacy Pairing downgrades.
Security AStatic scan found no risk patternsHow grading works ›

What this skill does

Harden Ble is a community-contributed Claude Code skill in the network-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/harden-ble/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when designing or reviewing a BLE GATT server, hardening pairing on an IoT device, smart lock, or BLE gateway, triaging an unbonded peer that walked your GATT tree, or hunting for Just Works and LE Legacy Pairing downgrades.

Who uses this skill

The Harden Ble Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 211,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/harden-ble
curl -L https://claudskills.com/skills/harden-ble/SKILL.md \
  -o ~/.claude/skills/harden-ble/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/harden-ble/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/harden-ble/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\harden-ble\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Harden Ble Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/harden-ble/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Harden Ble skill do?
GATT access control and pairing hardening for Bluetooth Low Energy devices that treat the radio link as the trust boundary: privileged GATT characteristics left open without authentication or encryption, Just Works pairing with no MITM protection, and LE Legacy Pairing with a recoverable key (MITRE ATT&CK T1557, T1040, T1011.001). The signal is link and attribute layer: HCI and btsnoop traces, the SMP pairing exchange, ATT error responses, BlueZ bluetoothd journald records, and Windows Bluetooth ETW channels. The skill gives the GATT permission model to enforce, the pairing settings to mandate (LE Secure Connections, 16-byte keys), defender-view signals, a hunt, and framework-mapped hardening. Use when designing or reviewing a BLE GATT server, hardening pairing on an IoT device, smart lock, or BLE gateway, triaging an unbonded peer that walked your GATT tree, or hunting for Just Works and LE Legacy Pairing downgrades.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Harden Ble skill?
Use Harden Ble when your Claude Code task falls under the Security category — specifically in the network security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Harden Ble" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the Harden Ble skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Harden Ble is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
umbrasec-labs. (2026). Harden Ble [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/harden-ble/
BibTeX
@misc{harden-ble-2026,
  author    = {umbrasec-labs},
  title     = {Harden Ble [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/harden-ble/}
}

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Security scan

Grade A · scanned 2026-10-25 — free static scan against the OWASP Agentic Skills Top 10.

No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›

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More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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