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.
npx skills add vaquarkhan/compliance-agent-skills --skill pci-dss-encryption-key-managementgit clone --depth 1 https://github.com/vaquarkhan/compliance-agent-skillsWrote 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.
[](https://agentmods.dev/skills/vaquarkhan/compliance-agent-skills/pci-dss-encryption-key-management)<a href="https://agentmods.dev/skills/vaquarkhan/compliance-agent-skills/pci-dss-encryption-key-management"><img src="https://agentmods.dev/badge/skills/vaquarkhan/compliance-agent-skills/pci-dss-encryption-key-management/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.
<a href="https://agentmods.dev/skills/vaquarkhan/compliance-agent-skills/pci-dss-encryption-key-management"><img src="https://agentmods.dev/badge/skills/vaquarkhan/compliance-agent-skills/pci-dss-encryption-key-management.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00158 | $0.02722 |
| Opus 5.5 | $0.00063 | $0.01089 |
| Sonnet 5.5 | $0.00032 | $0.00544 |
| Haiku 4.5 | $0.00016 | $0.00272 |
Grade A, and why
pci-dss-encryption-key-management 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.
How it starts
The opening of the file, as written. The whole thing — 191 lines — stays where its author put it; the contents beside it link to each section on GitHub.
PCI-DSS Encryption and Key Management
Overview
This skill implements PCI-DSS v4.0 Requirements 3 and 4 for protecting account data at rest and in transit. These requirements apply to all systems that store, process, or transmit cardholder data (CHD) or sensitive authentication data (SAD).
Requirement 3 — Protect stored account data:
| Sub-requirement | Focus |
|---|---|
| 3.1 | Processes and mechanisms for protecting stored account data |
| 3.2 | SAD storage prohibited after authorization (full track, CVV, PIN)—never store post-auth |
| 3.3 | PAN masking when displayed (show first six/last four max per PCI guidance) |
| 3.4 | PAN rendered unreadable anywhere stored (encryption, hashing, tokenization, truncation) |
| 3.5 | Key management procedures documented and implemented |
| 3.6 | Cryptographic keys protected against disclosure and misuse |
| 3.7 | Key management documented for keys used to protect stored account data |
Requirement 4 — Protect CHD during transmission:
| Sub-requirement | Focus |
|---|---|
| 4.1 | Processes for strong cryptography during transmission over open, public networks |
| 4.2 | PAN protected with strong cryptography during transmission |
| 4.2.1 | Inventory of trusted keys and certificates |
| 4.2.2 | Wireless networks transmitting PAN use strong cryptography |
Key management lifecycle (Req 3.6–3.7): generation, distribution, storage, rotation, retirement, destruction. HSMs (Hardware Security Modules) or cloud KMS (AWS KMS, Azure Key Vault, GCP Cloud KMS) are standard for production PAN encryption.
This skill integrates Terraform MCP (mcp/terraform.mcp.json) and HashiCorp Vault patterns per references/compliance-as-code-patterns.md and compliance-as-code-governance.
When to Use
Use this skill when:
- Scoping encryption for databases, logs, backups, and agent evidence stores touching CHD
- Auditing key rotation, dual control, and split knowledge (Req 3.6)
- Validating tokenization architecture for scope reduction
- Reviewing TLS configuration on payment endpoints, APIs, and MCP transport (Req 4.2)
- Scanning Terraform/IaC for unencrypted RDS, S3, or cleartext PAN fields
- Assessing whether compliance agent/MCP logs or Postgres evidence DB contain PAN
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.
- 1mo ago First seen · 191 lines · 158 tokens per session scan A 22dae89d6c51
pci-dss-encryption-key-management is a skill published in the GitHub repository vaquarkhan/compliance-agent-skills (4 stars, last pushed 2mo ago), licensed MIT. It adds 158 tokens to every session and 2,722 once invoked, about $0.0006 per session on Opus 5.5. 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 2026-08-31.
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