Security Overview

// Security layers implementation
interface SecurityLayer {
  name: string
  controls: SecurityControl[]
  monitoring: MonitoringConfig
  alerts: AlertConfig[]
}
 
const securityArchitecture: SecurityLayer[] = [
  {
    name: 'Perimeter',
    controls: [
      { type: 'WAF', provider: 'Cloudflare' },
      { type: 'DDoS Protection', provider: 'Cloudflare' },
      { type: 'Rate Limiting', threshold: '100 req/min' }
    ],
    monitoring: {
      metrics: ['request_rate', 'error_rate', 'latency'],
      dashboard: 'perimeter-security'
    },
    alerts: [
      { metric: 'error_rate', threshold: 0.05, severity: 'high' },
      { metric: 'request_rate', threshold: 1000, severity: 'medium' }
    ]
  },
  {
    name: 'Application',
    controls: [
      { type: 'Authentication', method: 'OAuth2 + MFA' },
      { type: 'Authorization', method: 'RBAC' },
      { type: 'Input Validation', framework: 'Zod' },
      { type: 'CSRF Protection', implementation: 'Double Submit Cookie' }
    ],
    monitoring: {
      metrics: ['auth_failures', 'unauthorized_access', 'validation_errors'],
      dashboard: 'application-security'
    },
    alerts: [
      { metric: 'auth_failures', threshold: 5, severity: 'high' },
      { metric: 'unauthorized_access', threshold: 1, severity: 'critical' }
    ]
  },
  {
    name: 'Data',
    controls: [
      { type: 'Encryption at Rest', algorithm: 'AES-256-GCM' },
      { type: 'Encryption in Transit', protocol: 'TLS 1.3' },
      { type: 'Key Management', service: 'Google KMS' },
      { type: 'Data Masking', fields: ['ssn', 'account_number'] }
    ],
    monitoring: {
      metrics: ['encryption_failures', 'key_rotation', 'data_access'],
      dashboard: 'data-security'
    },
    alerts: [
      { metric: 'encryption_failures', threshold: 1, severity: 'critical' },
      { metric: 'unusual_data_access', threshold: 'anomaly', severity: 'high' }
    ]
  }
]

// Incident response workflow
enum IncidentSeverity {
  CRITICAL = 'P1', // Data breach, system compromise
  HIGH = 'P2',     // Unauthorized access, service disruption
  MEDIUM = 'P3',   // Policy violation, suspicious activity
  LOW = 'P4'       // Minor security issues
}
 
interface IncidentResponse {
  severity: IncidentSeverity
  detection: string
  containment: string[]
  eradication: string[]
  recovery: string[]
  lessons: string[]
  timeline: {
    detected: Date
    contained: Date
    resolved: Date
  }
}
 
const incidentResponsePlan = {
  [IncidentSeverity.CRITICAL]: {
    responseTime: '15 minutes',
    team: ['Security Lead', 'CTO', 'Legal', 'PR'],
    actions: [
      'Isolate affected systems',
      'Preserve evidence',
      'Notify executives',
      'Engage forensics team',
      'Prepare disclosure'
    ]
  },
  [IncidentSeverity.HIGH]: {
    responseTime: '1 hour',
    team: ['Security Lead', 'DevOps Lead'],
    actions: [
      'Assess scope',
      'Implement containment',
      'Review logs',
      'Apply patches'
    ]
  }
}

# Security monitoring configuration
monitoring:
  siem:
    platform: "Splunk Cloud"
    data_sources:
      - application_logs
      - infrastructure_logs
      - security_events
      - audit_trails
 
  alerts:
    - name: "Multiple Failed Logins"
      query: "failed_login_count > 5 within 5m"
      severity: high
      action: block_ip
 
    - name: "Data Exfiltration"
      query: "outbound_data > 100MB"
      severity: critical
      action: alert_security_team
 
    - name: "Privilege Escalation"
      query: "role_change to admin"
      severity: high
      action: require_approval
 
  dashboards:
    - security_overview
    - threat_intelligence
    - compliance_status
    - incident_metrics

interface SecurityKPIs {
  meanTimeToDetect: number      // Target: < 1 hour
  meanTimeToRespond: number     // Target: < 4 hours
  patchingCompliance: number     // Target: > 95%
  vulnerabilitiesOpen: number    // Target: < 10 critical
  securityTrainingCompletion: number // Target: 100%
  phishingTestFailureRate: number    // Target: < 5%
  auditFindingsOpen: number      // Target: 0 critical
  incidentsPerMonth: number      // Target: < 5
}
 
const currentMetrics: SecurityKPIs = {
  meanTimeToDetect: 45,         // minutes
  meanTimeToRespond: 180,       // minutes
  patchingCompliance: 98,       // percentage
  vulnerabilitiesOpen: 3,       // count
  securityTrainingCompletion: 95, // percentage
  phishingTestFailureRate: 3,   // percentage
  auditFindingsOpen: 0,         // count
  incidentsPerMonth: 2          // average
}