Security Overview

This document outlines the security architecture and practices implemented in CepatEdge.

Security Principles

Framing: Security is layered, not absolute. No system is "steel." We aim for continuous verification and paranoid thinking, not overconfidence. This document describes controls and practices; assume new threats and keep improving.

Defense in Depth

CepatEdge implements multiple layers of security controls:

• Network Level: Cloudflare edge protection
• Application Level: Input validation and sanitization
• Data Level: Encryption and access controls
• Infrastructure Level: Secure deployment practices

Zero Trust Architecture

• No implicit trust: Every request is authenticated and authorized
• Least privilege: Users only access necessary resources
• Continuous verification: Ongoing validation of security posture

Privacy by Design

• Data minimization: Only collect necessary data
• Purpose limitation: Data used only for intended purposes
• Retention controls: Automatic data cleanup and archiving

Authentication & Authorization

JWT-Based Authentication

• Algorithm: HMAC-SHA256 for token signing
• Expiration (target model): ~15 minutes for access tokens, ~7 days for refresh tokens (institution-configurable)
• Claims: Standard JWT claims with custom role information and session identifier/version
• Revocation: Server-side session store in Neon (with optional cache) checked on each request; see Token lifecycle & revocation for the full design.

Role-Based Access Control (RBAC)

// Role hierarchy
const roles = {
  employee: ['create_request', 'view_own_requests', 'update_own_requests'],
  technician: ['view_assigned_requests', 'update_assigned_requests', 'complete_requests'],
  department_head: ['approve_requests', 'assign_technicians', 'view_department_requests'],
  admin: ['manage_users', 'view_all_requests', 'delete_requests', 'system_admin']
}

Session Management

• Durable Objects: Server-side session storage
• Secure cookies: HttpOnly, Secure, SameSite flags
• Session timeout: Automatic logout after inactivity
• Concurrent sessions: Limited to prevent session hijacking

Data Protection

Encryption

• At Rest: AES-256 encryption for sensitive data
• In Transit: TLS 1.3 for all communications
• Database: Transparent data encryption (Neon)
• Backups: Encrypted backup storage

Data Classification

• Public: General maintenance information
• Internal: User details and request history
• Confidential: Authentication credentials
• Restricted: Audit logs and system data

Data Retention

• User Data: Retained for account lifetime + 30 days
• Audit Logs: Retained for 7 years (compliance requirement)
• Backups: Retained for 30 days with automatic cleanup
• Temporary Data: Automatic cleanup after 24 hours

Full policy and privacy/compliance alignment for institutional review: Data retention and privacy.

API Security

Input Validation

• Schema Validation: Zod schemas for all inputs
• Sanitization: Automatic XSS and injection prevention
• Rate Limiting: 1000 requests/hour per user
• Request Size Limits: 10MB maximum payload

Output Security

• Content-Type: Strict content-type validation
• CORS: Configured origins only
• Security Headers: Comprehensive security headers
• Error Handling: No sensitive information in errors

API Keys and Tokens

• Environment Variables: Secure secret storage
• Token Rotation: Automatic refresh token rotation
• Audit Logging: All token usage logged
• Revocation: Immediate token invalidation capability

Infrastructure Security

Cloudflare Edge Security

• DDoS Protection: Automatic DDoS mitigation
• WAF: Web Application Firewall rules
• Bot Management: Automated bot detection
• SSL/TLS: Automatic certificate management

Database Security

• Connection Pooling: Limited connection counts
• Query Parameterization: Prepared statements only
• Access Controls: Database-level user permissions
• Audit Logging: All database operations logged

Durable Objects Security

• Isolation: Each object runs in isolated environment
• Access Control: Namespace-based access control
• State Encryption: Sensitive state data encrypted
• Timeout Protection: Automatic cleanup on inactivity

Compliance Considerations

GDPR Compliance

• Data Subject Rights: Right to access, rectify, erase data
• Consent Management: Clear consent for data processing
• Data Breach Notification: 72-hour breach notification
• Data Protection Officer: Designated security contact

Industry Standards

• OWASP Top 10: Protection against common vulnerabilities
• ISO 27001: Information security management
• SOC 2: Trust services criteria compliance

Threat Modeling

Common Threats

• Injection Attacks: SQL injection, XSS prevention
• Authentication Bypass: Multi-factor consideration
• Session Hijacking: Secure session management
• Data Exfiltration: Encryption and access controls

Mitigation Strategies

• Input Validation: Comprehensive input sanitization
• Access Controls: Principle of least privilege
• Monitoring: Continuous security monitoring
• Incident Response: Defined incident response procedures

Security Monitoring

Logging and Monitoring

• Application Logs: Structured logging with correlation IDs
• Security Events: Dedicated security event logging
• Performance Monitoring: Anomaly detection
• Audit Trails: Complete user activity tracking

Alerting

• Intrusion Detection: Automated threat detection
• Anomaly Alerts: Unusual activity patterns
• Compliance Alerts: Policy violation notifications
• Performance Alerts: Security-impacting performance issues

Incident Response

Incident Classification

• Critical: System compromise, data breach
• High: Authentication bypass, privilege escalation
• Medium: DoS attempts, unauthorized access attempts
• Low: Port scans, vulnerability probes

Response Process

1. Detection: Automated monitoring and alerting
2. Assessment: Impact and scope evaluation
3. Containment: Isolate affected systems
4. Recovery: Restore systems and data
5. Lessons Learned: Post-incident analysis

Security Testing

Automated Testing

• SAST: Static application security testing
• DAST: Dynamic application security testing
• Dependency Scanning: Automated vulnerability detection
• Container Scanning: Infrastructure security testing

Manual Testing

• Penetration Testing: Quarterly external security audits
• Code Reviews: Security-focused code review process
• Red Team Exercises: Simulated attack scenarios
• Compliance Audits: Regular compliance verification

Security Training

Developer Training

• Secure Coding: OWASP secure coding practices
• Threat Modeling: Security consideration in design
• Incident Response: Security incident handling
• Compliance: Regulatory requirement awareness

User Education

• Password Security: Strong password requirements
• Phishing Awareness: Social engineering prevention
• Data Handling: Proper data classification and handling
• Incident Reporting: Security incident reporting procedures

Security Roadmap

Immediate Priorities

• Security Headers: Implement comprehensive security headers
• CSP: Content Security Policy implementation
• HSTS: HTTP Strict Transport Security
• API Rate Limiting: Enhanced rate limiting rules

Medium-term Goals

• Multi-factor Authentication: Additional authentication factors
• API Security: Enhanced API protection mechanisms
• Compliance Automation: Automated compliance checking
• Security Dashboard: Real-time security monitoring dashboard

Long-term Vision

• Zero Trust Network: Complete zero trust implementation
• AI Security: AI-powered threat detection
• Quantum Resistance: Quantum-safe cryptographic algorithms
• Privacy Enhancing Technologies: Advanced privacy protection

Contact Information

Security Team

• Security Lead: Responsible for security architecture
• Compliance Officer: GDPR and compliance matters
• Incident Response: 24/7 incident response team

External Resources

• Bug Bounty: Responsible disclosure program
• Security Advisories: Security update notifications
• Documentation: Security implementation guides

Conclusion

Security is fundamental to CepatEdge's architecture and operations. We maintain a proactive security posture through layered controls, continuous monitoring, regular testing, and adherence to industry best practices. Security thinking stays paranoid, not confident. Our goal is enterprise-grade protection while maintaining the performance and cost-efficiency that makes CepatEdge unique. When presenting to institutions, emphasize audit transparency and accountability rather than absolute claims (see Handover and Positioning; institution-specific framing in university/our-planning/).