data-privacy-compliance

name	Data Privacy Compliance
description	Data privacy and regulatory compliance specialist for GDPR, CCPA, HIPAA, and international data protection laws. Use when implementing privacy controls, conducting data protection impact assessments, ensuring regulatory compliance, or managing data subject rights. Expert in consent management, data minimization, and privacy-by-design principles.

Data Privacy Compliance

Comprehensive guidance for implementing data privacy compliance across GDPR, CCPA, HIPAA, and other global data protection regulations.

When to Use This Skill

Use this skill when:

• Implementing GDPR, CCPA, or HIPAA compliance
• Conducting Data Protection Impact Assessments (DPIA)
• Managing data subject rights (access, deletion, portability)
• Implementing consent management systems
• Drafting privacy policies and notices
• Handling data breaches and incident response
• Designing privacy-by-design systems
• Conducting privacy audits and assessments

Key Regulations Overview

GDPR (General Data Protection Regulation)

Scope: EU residents' data, regardless of where company is located Key Requirements:

• Lawful basis for processing (consent, contract, legitimate interest, etc.)
• Data subject rights (access, deletion, portability, objection)
• Data Protection Impact Assessments for high-risk processing
• 72-hour breach notification requirement
• Records of processing activities
• Privacy by design and by default

Penalties: Up to €20M or 4% of global annual revenue

CCPA/CPRA (California Consumer Privacy Act)

Scope: California residents' data Key Requirements:

• Right to know what data is collected
• Right to delete personal information
• Right to opt-out of sale/sharing
• Right to correct inaccurate information
• Right to limit use of sensitive personal information

Penalties: Up to $7,500 per intentional violation

HIPAA (Health Insurance Portability and Accountability Act)

Scope: Protected Health Information (PHI) in the US Key Requirements:

• Privacy Rule (patient rights and information uses)
• Security Rule (safeguards for ePHI)
• Breach Notification Rule (60-day notification)
• Business Associate Agreements (BAAs)

Penalties: Up to $1.5M per violation category per year

Data Subject Rights Implementation

1. Right to Access (GDPR Art. 15 / CCPA § 1798.100)

Request Handler:

async function handleAccessRequest(userId, email) {
  // Verify identity
  const verified = await verifyIdentity(email);
  if (!verified) throw new Error('Identity verification failed');

  // Collect all personal data
  const userData = await collectUserData(userId);

  // Format for readability
  const report = {
    personalInfo: userData.profile,
    activityLogs: userData.activities,
    preferences: userData.settings,
    thirdPartySharing: userData.dataSharing,
    retentionPeriod: '2 years from last activity',
    dataProtectionOfficer: '[e-mail]'
  };

  // Generate downloadable report
  const pdf = await generatePDFReport(report);

  // Log request for compliance
  await logAccessRequest(userId, 'completed');

  return pdf;
}

Response Timeline:

• GDPR: 1 month (extendable to 3 months)
• CCPA: 45 days (extendable to 90 days)

2. Right to Deletion (GDPR Art. 17 / CCPA § 1798.105)

Deletion Handler:

async function handleDeletionRequest(userId, email) {
  // Verify identity
  const verified = await verifyIdentity(email);
  if (!verified) throw new Error('Identity verification failed');

  // Check for legal obligations to retain
  const mustRetain = await checkRetentionRequirements(userId);
  if (mustRetain.required) {
    return {
      status: 'partial_deletion',
      retained: mustRetain.data,
      reason: mustRetain.legalBasis,
      retentionPeriod: mustRetain.period
    };
  }

  // Delete from all systems
  await Promise.all([
    deleteFromDatabase(userId),
    deleteFromBackups(userId), // Mark for deletion in next backup cycle
    deleteFromAnalytics(userId),
    deleteFromThirdPartyServices(userId),
    revokeAPIKeys(userId),
    anonymizeHistoricalRecords(userId)
  ]);

  // Confirm deletion
  await sendDeletionConfirmation(email);
  await logDeletionRequest(userId, 'completed');

  return { status: 'deleted', timestamp: new Date() };
}

Exceptions (when deletion can be refused):

• Legal obligations (tax records, contracts)
• Public interest/scientific research
• Defense of legal claims
• Exercise of freedom of expression

3. Right to Data Portability (GDPR Art. 20)

Export Handler:

async function handlePortabilityRequest(userId, format = 'json') {
  const userData = await collectUserData(userId);

  // Structure in machine-readable format
  const portableData = {
    exportDate: new Date().toISOString(),
    userId: userId,
    data: {
      profile: userData.profile,
      content: userData.userGeneratedContent,
      settings: userData.preferences,
      history: userData.activityHistory
    }
  };

  // Support multiple formats
  if (format === 'csv') {
    return convertToCSV(portableData);
  } else if (format === 'xml') {
    return convertToXML(portableData);
  }

  return portableData; // JSON by default
}

Requirements:

• Structured, commonly used, machine-readable format
• Ability to transmit directly to another controller
• Only applies to data provided by data subject
• Only for automated processing based on consent or contract

4. Right to Object (GDPR Art. 21)

Objection Handler:

async function handleObjectionRequest(userId, processingType) {
  switch (processingType) {
    case 'direct_marketing':
      // Must stop immediately
      await disableMarketing(userId);
      await updateConsent(userId, 'marketing', false);
      break;

    case 'legitimate_interest':
      // Assess if we have compelling grounds
      const assessment = await assessLegitimateInterest(userId);
      if (!assessment.compelling) {
        await stopProcessing(userId, processingType);
      }
      return assessment;

    case 'profiling':
      await disableProfiling(userId);
      await updateConsent(userId, 'profiling', false);
      break;

    default:
      throw new Error('Invalid processing type');
  }

  await logObjectionRequest(userId, processingType, 'granted');
}

Consent Management

Consent Requirements (GDPR)

Valid Consent Must Be:

1. Freely given (no coercion)
2. Specific (for each purpose)
3. Informed (clear language)
4. Unambiguous (clear affirmative action)
5. Withdrawable (as easy to withdraw as to give)

Consent Implementation:

<!-- Good: Granular consent -->
<form>
  <h3>Privacy Preferences</h3>

  <label>
    <input type="checkbox" name="essential" checked disabled>
    <strong>Essential cookies (Required)</strong>
    <p>Necessary for website functionality</p>
  </label>

  <label>
    <input type="checkbox" name="analytics" value="analytics">
    <strong>Analytics cookies</strong>
    <p>Help us improve our website by collecting usage data</p>
  </label>

  <label>
    <input type="checkbox" name="marketing" value="marketing">
    <strong>Marketing cookies</strong>
    <p>Show you personalized ads based on your interests</p>
  </label>

  <button type="submit">Save Preferences</button>
  <a href="/privacy-policy">Learn More</a>
</form>

Consent Record Storage:

const consentRecord = {
  userId: 'user123',
  timestamp: new Date().toISOString(),
  consentVersion: '2.0',
  purposes: {
    essential: { granted: true, required: true },
    analytics: { granted: true, purpose: 'Website improvement' },
    marketing: { granted: false, purpose: 'Personalized advertising' }
  },
  ipAddress: '192.168.1.1', // For proof
  userAgent: 'Mozilla/5.0...', // For context
  method: 'explicit_opt_in' // or 'implicit', 'presumed'
};

await saveConsentRecord(consentRecord);

Cookie Banner (GDPR Compliant)

<div id="cookie-banner" role="dialog" aria-labelledby="cookie-title">
  <h2 id="cookie-title">Cookie Preferences</h2>
  <p>
    We use cookies to enhance your experience. Choose which cookies you
    allow us to use. You can change your preferences at any time.
  </p>

  <button onclick="acceptAll()">Accept All</button>
  <button onclick="rejectNonEssential()">Reject Non-Essential</button>
  <button onclick="showPreferences()">Manage Preferences</button>
</div>

<script>
// Must not load non-essential cookies until consent given
function acceptAll() {
  setConsent({ analytics: true, marketing: true });
  loadAnalyticsCookies();
  loadMarketingCookies();
  hideBanner();
}

function rejectNonEssential() {
  setConsent({ analytics: false, marketing: false });
  hideBanner();
}
</script>

Privacy by Design Principles

1. Data Minimization

Principle: Collect only data necessary for specified purpose

Implementation:

// ❌ Bad: Collecting unnecessary data
const userRegistration = {
  email: req.body.email,
  password: req.body.password,
  fullName: req.body.fullName,
  phoneNumber: req.body.phoneNumber, // Not needed
  dateOfBirth: req.body.dateOfBirth, // Not needed
  address: req.body.address, // Not needed
  socialSecurityNumber: req.body.ssn // Definitely not needed!
};

// ✅ Good: Only essential data
const userRegistration = {
  email: req.body.email,
  password: hashPassword(req.body.password),
  displayName: req.body.displayName // Optional
};

2. Purpose Limitation

Principle: Use data only for specified, explicit purposes

Implementation:

// Document and enforce purpose
const dataProcessingPurpose = {
  email: [
    'account_authentication',
    'order_confirmations',
    'password_reset'
  ],
  phoneNumber: [
    'order_delivery_notifications'
    // NOT: 'marketing_calls' (requires separate consent)
  ],
  purchaseHistory: [
    'order_fulfillment',
    'customer_support'
    // NOT: 'targeted_advertising' (requires separate consent)
  ]
};

async function processData(data, purpose) {
  if (!isAllowedPurpose(data.type, purpose)) {
    throw new Error('Purpose not authorized for this data');
  }
  // Proceed with processing
}

3. Storage Limitation

Principle: Retain data only as long as necessary

Implementation:

const retentionPolicy = {
  userAccounts: {
    active: 'indefinite',
    inactive: '2 years',
    deleted: '30 days grace period'
  },
  orderRecords: '7 years', // Legal requirement
  supportTickets: '3 years',
  analytics: '26 months',
  marketingData: '1 year or until consent withdrawn'
};

// Automated data deletion
async function enforceRetentionPolicy() {
  const now = new Date();

  // Delete inactive accounts
  await User.deleteMany({
    lastActive: { $lt: subYears(now, 2) },
    status: 'inactive'
  });

  // Anonymize old analytics
  await Analytics.updateMany(
    { createdAt: { $lt: subMonths(now, 26) } },
    { $unset: { userId: 1, ipAddress: 1 } }
  );

  // Delete expired marketing consent
  await MarketingConsent.deleteMany({
    $or: [
      { expiresAt: { $lt: now } },
      { withdrawnAt: { $lt: subDays(now, 30) } }
    ]
  });
}

// Schedule daily
cron.schedule('0 2 * * *', enforceRetentionPolicy);

Data Protection Impact Assessment (DPIA)

When Required (GDPR Art. 35):

• Systematic and extensive profiling
• Large-scale processing of sensitive data
• Systematic monitoring of publicly accessible areas
• New technologies with high privacy risks

DPIA Template:

# Data Protection Impact Assessment

## Processing Overview
- **Purpose**: [Describe the processing activity]
- **Data Types**: [Personal data categories]
- **Data Subjects**: [Who is affected]
- **Recipients**: [Who receives the data]

## Necessity Assessment
- [ ] Is processing necessary for the stated purpose?
- [ ] Could the purpose be achieved with less data?
- [ ] Is the retention period justified?

## Risk Assessment
| Risk | Likelihood | Severity | Mitigation |
|------|------------|----------|------------|
| Data breach | Medium | High | Encryption, access controls |
| Unauthorized access | Low | High | 2FA, audit logs |
| Purpose creep | Medium | Medium | Purpose documentation, training |

## Safeguards
- [ ] Encryption at rest and in transit
- [ ] Access controls and authentication
- [ ] Regular security audits
- [ ] Data minimization applied
- [ ] Retention policies enforced
- [ ] DPO consulted
- [ ] Data subject rights mechanism in place

## Conclusion
Processing is/is not acceptable with proposed safeguards.

Signed: [Data Protection Officer]
Date: [Assessment Date]

Privacy Policy Requirements

Essential Elements:

# Privacy Policy

## 1. Identity of Controller
Company Name, Address, Contact Information
Data Protection Officer: [e-mail]

## 2. Data We Collect
- Account data: email, name
- Usage data: pages visited, features used
- Technical data: IP address, browser type

## 3. Legal Basis for Processing
- **Consent**: Marketing communications
- **Contract**: Order fulfillment
- **Legitimate Interest**: Fraud prevention
- **Legal Obligation**: Tax records

## 4. How We Use Your Data
- Provide services you requested
- Improve our products
- Send important updates
- [Be specific, avoid vague statements]

## 5. Data Sharing
- Payment processors (Stripe, PayPal)
- Shipping providers (FedEx, UPS)