Soc2 Compliance

2. Availability (A)

• SLA definitions (99.9%, 99.99%)
• Uptime monitoring (health checks, synthetic monitoring)
• Disaster recovery plan tested annually
• Capacity planning documented
• Failover procedures tested
• Backup verification (restore tests quarterly)

3. Processing Integrity (PI)

• Input validation on all data entry points
• Data processing accuracy checks
• Error handling and correction procedures
• Output reconciliation
• Transaction logging with checksums

4. Confidentiality (C)

• Data classification policy (Public, Internal, Confidential, Restricted)
• Encryption at rest (AES-256)
• Encryption in transit (TLS 1.2+)
• Key management procedures (rotation, revocation)
• Confidential data access logging
• NDA tracking for third parties

5. Privacy (P)

• Privacy notice published
• Consent collection mechanism
• Data subject request handling (30 gun)
• Data retention and disposal schedule
• Third-party data sharing agreements

Access Control Checklist

Authentication

// MFA enforcement middleware
async function requireMFA(req: Request, res: Response, next: NextFunction) {
  const user = req.user;
  if (!user) return res.status(401).json({ error: 'Unauthenticated' });

  if (!user.mfaVerified) {
    await auditLog({
      action: 'auth.mfa.required',
      actor: user.id,
      resource: req.path,
      result: 'blocked',
    });
    return res.status(403).json({ error: 'MFA verification required' });
  }
  next();
}

Authorization (RBAC)

interface Permission {
  resource: string;
  action: 'read' | 'write' | 'delete' | 'admin';
}

interface Role {
  name: string;
  permissions: Permission[];
}

function checkPermission(user: User, resource: string, action: string): boolean {
  const role = getRoleByName(user.role);
  const hasPermission = role.permissions.some(
    (p) => p.resource === resource && p.action === action
  );

  auditLog({
    action: `authz.${action}.${hasPermission ? 'granted' : 'denied'}`,
    actor: user.id,
    resource,
  });

  return hasPermission;
}

Access Review Checklist

• Quarterly access reviews for all systems
• Terminated employee access revoked within 24 hours
• Privileged access requires manager approval
• Service account inventory maintained
• API key rotation schedule (90 gun max)
• SSH key inventory and rotation

Audit Logging Requirements

What to Log (ZORUNLU)

Log Format

interface AuditLogEntry {
  id: string;               // UUID
  timestamp: string;         // ISO 8601
  action: string;           // 'user.login.success'
  actor: {
    id: string;
    email: string;
    ip: string;
    userAgent: string;
  };
  resource: {
    type: string;           // 'user', 'document', 'config'
    id: string;
    name?: string;
  };
  result: 'success' | 'failure' | 'error';
  details?: Record<string, unknown>;
  correlationId?: string;   // Request tracing
}

async function writeAuditLog(entry: AuditLogEntry): Promise<void> {
  // Append-only, tamper-evident storage
  await auditStore.append({
    ...entry,
    hash: computeHash(entry),  // Chain hash for integrity
  });
}

Anti-Patterns

Change Management

Change Request Template

## Change Request

**Requester:** [isim]
**Date:** [tarih]
**Priority:** [P0-P3]
**Type:** [Standard | Emergency | Normal]

### Description
[Ne degisecek]

### Impact Assessment
- Affected systems: [liste]
- Affected users: [kac kisi, hangi roller]
- Risk level: [Low | Medium | High | Critical]
- Rollback plan: [nasil geri alinir]

### Approval
- [ ] Engineering lead
- [ ] Security review (High/Critical risk)
- [ ] Business owner (user-facing changes)

### Implementation
- [ ] Changes tested in staging
- [ ] Monitoring dashboards checked
- [ ] Rollback procedure verified
- [ ] Post-deployment verification

CI/CD Gates

# SOC2 compliant pipeline