# LifeTimer - Security Audit Checklist

## Overview

This document provides a comprehensive security audit checklist for the LifeTimer app, covering authentication, data protection, API security, and compliance.

## Authentication & Authorization

### Supabase Auth
- [ ] Verify only public anon key is shipped in the app
- [ ] Ensure service role key is never exposed in client code
- [ ] Implement proper session management
- [ ] Handle token refresh correctly
- [ ] Securely store session tokens (platform secure storage)
- [ ] Implement proper logout (clear all session data)
- [ ] Handle authentication errors gracefully
- [ ] Implement rate limiting for auth attempts

### OAuth Providers
- [ ] Google Sign-In properly configured
- [ ] Apple Sign-In properly configured
- [ ] OAuth tokens stored securely
- [ ] OAuth token refresh handled correctly
- [ ] OAuth logout implemented

### Password Security
- [ ] Password never stored in plain text
- [ ] Password reset flow is secure
- [ ] Password strength requirements enforced
- [ ] Password change requires current password
- [ ] Password reset tokens have expiration

## Data Protection

### Encryption
- [ ] Data at rest encrypted (Supabase handles this)
- [ ] Data in transit encrypted (HTTPS/TLS)
- [ ] Sensitive data not logged
- [ ] Local storage encrypted (Hive with encryption)

### Data Minimization
- [ ] Only collect necessary user data
- [ ] No unnecessary PII collected
- [ ] Data retention policy defined
- [ ] Old data cleanup implemented

### Data Access Control
- [ ] Row Level Security (RLS) enabled on all tables
- [ ] RLS policies tested and verified
- [ ] Users can only access their own data
- [ ] Public profiles expose only non-sensitive fields
- [ ] Admin access properly restricted

## API Security

### Supabase Client
- [ ] Client initialized securely
- [ ] Environment variables protected
- [ ] No hardcoded credentials
- [ ] Proper error handling for API calls
- [ ] Request/response logging (without sensitive data)

### API Calls
- [ ] Input validation on all user inputs
- [ ] SQL injection prevention (Supabase handles this)
- [ ] XSS prevention (Flutter handles this)
- [ ] Rate limiting implemented
- [ ] Timeout handling for network requests

### External APIs
- [ ] Unsplash API key secured
- [ ] Pexels API key secured
- [ ] Google Maps API key secured
- [ ] API keys stored in environment variables
- [ ] API key rotation plan in place

## Privacy & Compliance

### Privacy Policy
- [ ] Privacy policy written and accessible
- [ ] Privacy policy covers all data collection
- [ ] Privacy policy includes user rights
- [ ] Privacy policy includes contact information
- [ ] Privacy policy updated regularly

### User Rights
- [ ] Data export functionality available
- [ ] Data deletion functionality available
- [ ] Account deletion implemented
- [ ] User can view their data
- [ ] User can edit their data

### Consent Management
- [ ] Terms of service accessible
- [ ] Privacy consent obtained
- [ ] Marketing opt-out available
- [ ] Cookie policy (if applicable)

## Code Security

### Dependencies
- [ ] All dependencies up to date
- [ ] No known vulnerabilities in dependencies
- [ ] Dependency audit performed
- [ ] Unused dependencies removed
- [ ] Third-party libraries reviewed

### Code Quality
- [ ] No hardcoded secrets or keys
- [ ] No debug code in production
- [ ] No commented-out code with sensitive info
- [ ] Error messages don't expose sensitive data
- [ ] Logging doesn't include sensitive data

### Memory Management
- [ ] No memory leaks
- [ ] Proper disposal of resources
- [ ] Controllers properly disposed
- [ ] Timers properly cancelled
- [ ] Streams properly closed

## Network Security

### HTTPS/TLS
- [ ] All API calls use HTTPS
- [ ] Certificate pinning considered
- [ ] Proper SSL/TLS configuration
- [ ] Insecure connections rejected

### Network Requests
- [ ] Request/response size optimized
- [ ] Compression enabled
- [ ] Caching implemented appropriately
- [ ] Offline mode doesn't expose data

## Storage Security

### Local Storage
- [ ] Sensitive data not stored in plain text
- [ ] Hive encryption enabled
- [ ] Secure storage APIs used for tokens
- [ ] Local cache cleared on logout
- [ ] No sensitive data in SharedPreferences

### Supabase Storage
- [ ] Storage buckets properly configured
- [ ] Storage RLS policies enabled
- [ ] File size limits enforced
- [ ] File type restrictions enforced
- [ ] Public vs private storage properly configured

## Input Validation

### User Inputs
- [ ] All form inputs validated
- [ ] Email format validated
- [ ] Password strength validated
- [ ] Goal titles validated
- [ ] File uploads validated

### Sanitization
- [ ] User input sanitized before storage
- [ ] HTML/JS injection prevented
- [ ] File names sanitized
- [ ] URLs validated
- [ ] No arbitrary code execution

## Error Handling

### Security-Focused Error Messages
- [ ] Generic error messages for users
- [ ] Detailed errors logged securely
- [ ] No stack traces exposed to users
- [ ] No sensitive data in error messages
- [ ] Proper HTTP status codes

### Crash Reporting
- [ ] Crash reporting configured
- [ ] No sensitive data in crash reports
- [ ] User consent for crash reporting
- [ ] Crash reports reviewed regularly

## Session Management

### Session Security
- [ ] Sessions have expiration
- [ ] Session tokens refreshed automatically
- [ ] Concurrent sessions limited
- [ ] Session invalidation on logout
- [ ] Session invalidation on password change

### Authentication State
- [ ] Auth state properly managed
- [ ] Auth state persisted securely
- [ ] Auth state cleared on logout
- [ ] Auth state validated on app start

## Testing

### Security Testing
- [ ] Penetration testing performed
- [ ] Vulnerability scanning completed
- [ ] Authentication flows tested
- [ ] Authorization tested
- [ ] Input validation tested

### Code Review
- [ ] Security-focused code review
- [ ] Peer review of sensitive code
- [ ] Static analysis performed
- [ ] Dependency analysis performed
- [ ] Third-party code audited

## Platform-Specific Security

### iOS
- [ ] App Transport Security (ATS) enabled
- [ ] Keychain used for sensitive data
- [ ] Proper entitlements configured
- [ ] Code signing verified
- [ ] App sandboxing respected

### Android
- [ ] Network Security Config configured
- [ ] Keystore used for sensitive data
- [ ] Proper permissions requested
- [ ] ProGuard/R8 enabled for release
- [ ] App signing verified

## Compliance

### GDPR (EU)
- [ ] Data processing legal basis documented
- [ ] User consent obtained
- [ ] Data portability implemented
- [ ] Right to be forgotten implemented
- [ ] Data breach notification process

### CCPA (California)
- [ ] Privacy notice provided
- [ ] Opt-out mechanism available
- [ ] Data deletion request process
- [ ] Data disclosure tracking
- [ ] Non-discrimination policy

### App Store Guidelines
- [ ] Apple App Store guidelines followed
- [ ] Google Play Store guidelines followed
- [ ] No prohibited content
- [ ] Proper age rating
- [ ] Appropriate content description

## Monitoring & Incident Response

### Security Monitoring
- [ ] Security events logged
- [ ] Anomaly detection configured
- [ ] Failed login attempts monitored
- [ ] Unusual activity alerts configured
- [ ] Regular security audits scheduled

### Incident Response
- [ ] Incident response plan documented
- [ ] Security incident contact identified
- [ ] Data breach procedure defined
- [ ] Communication plan prepared
- [ ] Recovery procedures tested

## Documentation

### Security Documentation
- [ ] Security architecture documented
- [ ] Threat model documented
- [ ] Security controls documented
- [ ] Incident response plan documented
- [ ] User security guide available

## Release Checklist

### Before Public Launch
- [ ] All critical security issues resolved
- [ ] All high-priority security issues resolved
- [ ] Security audit completed
- [ ] Penetration testing completed
- [ ] Dependencies audited
- [ ] Code review completed
- [ ] Security documentation updated
- [ ] Incident response plan tested

### Ongoing
- [ ] Regular security updates
- [ ] Dependency updates
- [ ] Security monitoring
- [ ] User feedback reviewed
- [ ] Threat landscape monitored

## Tools & Resources

### Security Tools
- **Static Analysis**: Dart analyzer, flutter analyze
- **Dependency Scanning**: npm audit, safety
- **Penetration Testing**: OWASP ZAP, Burp Suite
- **Code Review**: Manual review, GitHub security

### Resources
- **OWASP Mobile Security**: https://owasp.org/www-project-mobile-security/
- **Flutter Security**: https://flutter.dev/docs/development/data-and-backend/security
- **Supabase Security**: https://supabase.com/docs/guides/platform/security
- **App Store Security**: https://developer.apple.com/app-store/review/guidelines/

## Next Steps

1. Complete all checklist items
2. Document any findings or issues
3. Create remediation plan for any issues found
4. Implement fixes
5. Re-test and verify
6. Prepare security report
7. Update documentation

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## Severity Definitions

### Critical
- Immediate security risk
- Data exposure possible
- Requires immediate fix

### High
- Significant security risk
- Potential data exposure
- Fix before public launch

### Medium
- Moderate security risk
- Unlikely to cause data exposure
- Fix in next release

### Low
- Minor security issue
- Cosmetic or documentation
- Fix when convenient

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## Notes

Use this section to document specific findings, recommendations, or notes during the audit process.

| Date | Item | Severity | Status | Notes |
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