# Security Policy

## Overview

This document outlines the security measures implemented in the QR Generator System and best practices for maintaining a secure environment.

---

## Security Features

### 1. Authentication & Authorization

**Session-Based Authentication:**
- Secure session cookies with HttpOnly flag
- Session regeneration on login
- Automatic session timeout (8 hours default)
- CSRF token protection on all forms

**Password Security:**
- Bcrypt hashing (cost factor: 10)
- Minimum 8 characters required
- Password confirmation on creation
- Secure password reset flow

**Role-Based Access Control (RBAC):**
- Admin: Full system access
- Manager: QR management, analytics, campaigns
- Staff: Create/edit QR codes, view analytics
- Viewer: Read-only access

### 2. Input Validation

**Server-Side Validation:**
- All user input is validated
- SQL injection prevention via PDO prepared statements
- XSS protection via output escaping
- File upload validation

**CSRF Protection:**
- Token-based CSRF protection
- Tokens regenerated per session
- Validated on all POST/PUT/DELETE requests

### 3. Database Security

**Connection Security:**
- Dedicated database user with minimal privileges
- Strong password requirements
- Connection over localhost (no remote access)
- Prepared statements for all queries

**Data Protection:**
- Passwords hashed with bcrypt
- Sensitive data encrypted at rest (optional)
- Regular database backups
- Audit logging enabled

### 4. File Security

**Upload Security:**
- File type validation
- File size limits
- Secure file storage outside web root
- Virus scanning (recommended)

**Access Control:**
- QR codes stored in protected directory
- Direct file access prevented
- Download through application only

### 5. Network Security

**HTTPS Enforcement:**
- SSL/TLS required in production
- Secure cookie flag enabled
- HSTS headers configured
- Mixed content prevention

**IP Restrictions (Optional):**
- Whitelist allowed IP addresses
- VPN requirement option
- Geographic restrictions

### 6. Headers & Policies

**Security Headers:**
```
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Referrer-Policy: strict-origin-when-cross-origin
Content-Security-Policy: default-src 'self'
```

---

## Threat Model

### Identified Threats

1. **Unauthorized Access**
   - Mitigation: Strong authentication, session management
   - Status: Protected

2. **SQL Injection**
   - Mitigation: PDO prepared statements
   - Status: Protected

3. **Cross-Site Scripting (XSS)**
   - Mitigation: Output escaping, CSP headers
   - Status: Protected

4. **Cross-Site Request Forgery (CSRF)**
   - Mitigation: CSRF tokens
   - Status: Protected

5. **Session Hijacking**
   - Mitigation: Secure cookies, HTTPS, session regeneration
   - Status: Protected

6. **Brute Force Attacks**
   - Mitigation: Rate limiting (recommended)
   - Status: Partially protected

7. **Data Exposure**
   - Mitigation: Audit logging, access controls
   - Status: Protected

---

## Security Checklist

### Pre-Production

- [ ] Change all default passwords
- [ ] Enable HTTPS with valid SSL certificate
- [ ] Set `APP_DEBUG=false` in production
- [ ] Configure strong database password
- [ ] Enable audit logging
- [ ] Set up regular backups
- [ ] Configure IP restrictions (if needed)
- [ ] Review file permissions
- [ ] Enable security headers
- [ ] Test authentication flows
- [ ] Verify CSRF protection
- [ ] Check for exposed sensitive files

### Post-Production

- [ ] Monitor error logs daily
- [ ] Review audit logs weekly
- [ ] Update dependencies monthly
- [ ] Perform security audits quarterly
- [ ] Test backup restoration
- [ ] Review user access permissions
- [ ] Check for unauthorized changes
- [ ] Monitor disk space usage

---

## Incident Response Plan

### 1. Detection

**Monitoring:**
- Error log monitoring
- Unusual activity detection
- Failed login attempts
- Unauthorized access attempts

**Alerts:**
- Multiple failed logins
- Privilege escalation attempts
- Suspicious file modifications
- Database anomalies

### 2. Response

**Immediate Actions:**
1. Isolate affected systems
2. Preserve evidence (logs, files)
3. Notify security team
4. Document incident timeline

**Investigation:**
1. Review audit logs
2. Check database for unauthorized changes
3. Analyze access logs
4. Identify attack vector
5. Assess data exposure

### 3. Recovery

**Steps:**
1. Patch vulnerabilities
2. Restore from clean backup (if needed)
3. Reset all credentials
4. Review and update security policies
5. Notify affected users
6. Document lessons learned

### 4. Post-Incident

**Actions:**
1. Conduct security review
2. Update security procedures
3. Implement additional controls
4. Train staff on new procedures
5. Schedule follow-up audit

---

## Vulnerability Reporting

### Internal Reporting

**Contact:**
- Security Team: security@company.internal
- Emergency: +1-XXX-XXX-XXXX

**Information to Include:**
1. Description of vulnerability
2. Steps to reproduce
3. Potential impact
4. Suggested remediation
5. Your contact information

**Response Timeline:**
- Acknowledgment: Within 24 hours
- Initial assessment: Within 48 hours
- Remediation plan: Within 1 week
- Fix deployment: Based on severity

### Severity Levels

**Critical:**
- Remote code execution
- Authentication bypass
- Data breach
- Response: Immediate (< 24 hours)

**High:**
- Privilege escalation
- SQL injection
- XSS vulnerabilities
- Response: Within 3 days

**Medium:**
- Information disclosure
- CSRF vulnerabilities
- Weak encryption
- Response: Within 1 week

**Low:**
- Minor information leaks
- UI/UX security issues
- Response: Within 2 weeks

---

## Security Best Practices

### For Administrators

1. **Access Management**
   - Use strong, unique passwords
   - Enable 2FA (when available)
   - Limit admin accounts
   - Regular access reviews

2. **System Maintenance**
   - Keep software updated
   - Monitor security advisories
   - Regular security audits
   - Backup verification

3. **Monitoring**
   - Review logs regularly
   - Set up alerts
   - Monitor user activity
   - Track system changes

### For Users

1. **Password Security**
   - Use strong passwords (12+ characters)
   - Don't share credentials
   - Change passwords regularly
   - Use password manager

2. **Session Security**
   - Logout when finished
   - Don't share sessions
   - Use secure networks
   - Report suspicious activity

3. **Data Handling**
   - Don't expose QR codes publicly (unless intended)
   - Verify URLs before creating QR codes
   - Report security concerns
   - Follow data handling policies

---

## Compliance

### Data Protection

**GDPR Considerations:**
- User consent for data collection
- Right to access personal data
- Right to deletion
- Data breach notification

**Internal Policies:**
- Data retention policies
- Access control policies
- Incident response procedures
- Regular security training

### Audit Requirements

**Logging:**
- All user actions logged
- System changes tracked
- Access attempts recorded
- Logs retained for 2 years

**Reporting:**
- Monthly security reports
- Quarterly access reviews
- Annual security audits
- Incident reports

---

## Security Updates

### Update Process

1. **Monitor Security Advisories**
   - PHP security announcements
   - Dependency vulnerabilities
   - Framework updates

2. **Testing**
   - Test updates in staging
   - Verify functionality
   - Check for breaking changes

3. **Deployment**
   - Schedule maintenance window
   - Backup before update
   - Deploy updates
   - Verify system functionality

4. **Documentation**
   - Document changes
   - Update security policies
   - Notify users if needed

---

## Contact Information

**Security Team:**
- Email: security@company.internal
- Phone: +1-XXX-XXX-XXXX (24/7)
- Emergency: +1-XXX-XXX-XXXX

**Escalation:**
- IT Director: director@company.internal
- CISO: ciso@company.internal

---

## Appendix

### Security Tools

**Recommended:**
- Fail2ban (brute force protection)
- ModSecurity (WAF)
- OSSEC (intrusion detection)
- Lynis (security auditing)

### Security Resources

- OWASP Top 10: https://owasp.org/www-project-top-ten/
- PHP Security Guide: https://www.php.net/manual/en/security.php
- MySQL Security: https://dev.mysql.com/doc/refman/8.0/en/security.html

---

**Last Updated:** 2024-01-21  
**Version:** 1.0.0  
**Next Review:** 2024-04-21
