Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill data-encryption- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads data-encryption automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Data Encryption
Table of Contents
Overview
Implement robust encryption strategies for protecting sensitive data at rest and in transit using industry-standard cryptographic algorithms and key management practices.
When to Use
- Sensitive data storage
- Database encryption
- File encryption
- Communication security
- Compliance requirements (GDPR, HIPAA, PCI-DSS)
- Password storage
- End-to-end encryption
Quick Start
Minimal working example:
// encryption-service.js
const crypto = require("crypto");
const fs = require("fs").promises;
class EncryptionService {
constructor() {
// AES-256-GCM for symmetric encryption
this.algorithm = "aes-256-gcm";
this.keyLength = 32; // 256 bits
this.ivLength = 16; // 128 bits
this.saltLength = 64;
this.tagLength = 16;
}
/**
* Generate a cryptographically secure random key
*/
generateKey() {
return crypto.randomBytes(this.keyLength);
}
/**
* Derive a key from a password using PBKDF2
*/
async deriveKey(password, salt = null) {
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| Node.js Encryption Library | Node.js Encryption Library |
| Python Cryptography Implementation | Python Cryptography Implementation |
| Database Encryption (PostgreSQL) | Database Encryption (PostgreSQL) |
| TLS/SSL Configuration | TLS/SSL Configuration |
Best Practices
✅ DO
- Use AES-256-GCM for symmetric encryption
- Use RSA-4096 or ECC for asymmetric encryption
- Implement proper key rotation
- Use secure key storage (HSM, KMS)
- Salt and hash passwords
- Use TLS 1.2+ for transit encryption
- Implement key derivation (PBKDF2, Argon2)
- Use authenticated encryption
❌ DON'T
- Roll your own crypto
- Store keys in code
- Use ECB mode
- Use MD5 or SHA1
- Reuse IVs/nonces
- Use weak key lengths
- Skip authentication tags
FAQ
What does the data-encryption skill do?
Implement strong encryption using AES, RSA, TLS, and proper key management. Use when securing data at rest, in transit, or implementing end-to-end encryption.
How do I install data-encryption?
Run npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill data-encryption in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/data-encryption/ (personal) or .claude/skills/data-encryption/ (project).
Which AI agents can use data-encryption?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is data-encryption safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains data-encryption?
It is published by aj-geddes in aj-geddes/useful-ai-prompts. It has 611 recorded installs.
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