Gdpr Data Handling

---
name: gdpr-data-handling
description: Implement GDPR-compliant data handling with consent management, data subject rights, and privacy by design. Use when building systems that process EU personal data, implementing privacy controls, or conducting GDPR compliance reviews.
category: development-code
version: 1.0.0
---

# GDPR Data Handling

Practical implementation guide for GDPR-compliant data processing, consent management, and privacy controls.

## When to Use This Skill

- Building systems that process EU personal data
- Implementing consent management
- Handling data subject requests (DSRs)
- Conducting GDPR compliance reviews
- Designing privacy-first architectures
- Creating data processing agreements

## Core Concepts

### 1. Personal Data Categories

| Category               | Examples                    | Protection Level   |
| ---------------------- | --------------------------- | ------------------ |
| **Basic**              | Name, email, phone          | Standard           |
| **Sensitive (Art. 9)** | Health, religion, ethnicity | Explicit consent   |
| **Criminal (Art. 10)** | Convictions, offenses       | Official authority |
| **Children's**         | Under 16 data               | Parental consent   |

### 2. Legal Bases for Processing

```
Article 6 - Lawful Bases:
├── Consent: Freely given, specific, informed
├── Contract: Necessary for contract performance
├── Legal Obligation: Required by law
├── Vital Interests: Protecting someone's life
├── Public Interest: Official functions
└── Legitimate Interest: Balanced against rights
```

### 3. Data Subject Rights

```
Right to Access (Art. 15)      ─┐
Right to Rectification (Art. 16) │
Right to Erasure (Art. 17)       │ Must respond
Right to Restrict (Art. 18)      │ within 1 month
Right to Portability (Art. 20)   │
Right to Object (Art. 21)       ─┘
```

## Detailed worked examples and patterns

Detailed sections (starting with `## Implementation Patterns`) live in `references/details.md`. Read that file when the navigation summary above is insufficient.

## Best Practices

### Do's

- **Minimize data collection** - Only collect what's needed
- **Document everything** - Processing activities, legal bases
- **Encrypt PII** - At rest and in transit
- **Implement access controls** - Need-to-know basis
- **Regular audits** - Verify compliance continuously

### Don'ts

- **Don't pre-check consent boxes** - Must be opt-in
- **Don't bundle consent** - Separate purposes separately
- **Don't retain indefinitely** - Define and enforce retention
- **Don't ignore DSARs** - 30-day response required
- **Don't transfer without safeguards** - SCCs or adequacy decisions