Enterprise Deployment

// Example: Production Service Architecture
import { Queue } from 'bullmq';
import { Redis } from 'ioredis';
import { HSM } from '@aws-hsm/client';

class EnterpriseAuthService {
    constructor(config) {
        this.config = config;

        // Initialize distributed components
        this.redis = new Redis(config.redis);
        this.queue = new Queue('authentication', { connection: this.redis });
        this.hsm = new HSM(config.hsm);
        this.fingerprintDB = this.initFingerprintDB();
        this.detectionService = this.initDetectionService();
        this.provenanceStore = this.initProvenanceStore();

        // Initialize caching layers
        this.verificationCache = this.initCache('verification', 3600);
        this.manifestCache = this.initCache('manifests', 86400);
    }

    async authenticate(content, metadata) {
        const requestId = this.generateRequestId();

        try {
            // 1. Pre-flight validation
            await this.validateContent(content, metadata);

            // 2. Generate fingerprint in parallel with detection
            const [fingerprint, detection] = await Promise.all([
                this.fingerprintService.generate(content),
                this.runDetection(content, metadata)
            ]);

            // 3. Check for duplicates
            const existing = await this.checkExisting(fingerprint);
            if (existing && this.config.deduplicate) {
                return this.createDuplicateResponse(existing);
            }

            // 4. Evaluate detection results
            if (detection.is_deepfake && this.config.reject_deepfakes) {
                throw new AuthenticationError(
                    'Content failed authenticity check',
                    { detection, requestId }
                );
            }

            // 5. Create C2PA manifest
            const manifest = await this.createManifest(
                content,
                metadata,
                fingerprint,
                detection
            );

            // 6. Sign with HSM
            const signature = await this.hsm.sign(
                this.serializeManifest(manifest),
                this.config.signingKeyId
            );

            manifest.signature_info = {
                alg: 'es256',
                signature: signature.toString('base64'),
                timestamp: new Date().toISOString()
            };

            // 7. Embed manifest in content
            const authenticated = await this.embedManifest(content, manifest);

            // 8. Store provenance asynchronously
            this.queue.add('store-provenance', {
                manifest,
                fingerprint,
                detection,
                requestId
            });

            // 9. Update metrics
            this.metrics.authenticationsTotal.inc();
            this.metrics.authenticationDuration.observe(
                Date.now() - requestId.timestamp
            );

            return {
                content: authenticated,
                manifest_id: manifest.instance_id,
                fingerprint: fingerprint,
                request_id: requestId
            };

        } catch (error) {
            this.handleError(error, requestId);
            throw error;
        }
    }

    async verify(content) {
        // Check cache first
        const contentHash = await this.hashContent(content);
        const cached = await this.verificationCache.get(contentHash);

        if (cached) {
            this.metrics.cacheHits.inc();
            return cached;
        }

        this.metrics.cacheMisses.inc();

        // Perform full verification
        const result = await this.performVerification(content);

        // Cache the result
        await this.verificationCache.set(
            contentHash,
            result,
            this.config.cacheTTL
        );

        return result;
    }

    async scale() {
        // Auto-scaling based on queue depth and latency
        const queueDepth = await this.queue.count();
        const avgLatency = await this.getAverageLatency();

        if (queueDepth > this.config.scaleUpThreshold ||
            avgLatency > this.config.latencyThreshold) {
            await this.deploymentManager.scaleUp();
        } else if (queueDepth < this.config.scaleDownThreshold) {
            await this.deploymentManager.scaleDown();
        }
    }
}

# Kubernetes HorizontalPodAutoscaler configuration
apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: auth-service-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: auth-service
  minReplicas: 10
  maxReplicas: 100
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 80
  - type: Pods
    pods:
      metric:
        name: authentication_queue_depth
      target:
        type: AverageValue
        averageValue: "100"
  behavior:
    scaleUp:
      stabilizationWindowSeconds: 60
      policies:
      - type: Percent
        value: 50
        periodSeconds: 60
    scaleDown:
      stabilizationWindowSeconds: 300
      policies:
      - type: Pods
        value: 2
        periodSeconds: 60

class MultiTierCache {
    constructor() {
        // L1: In-memory cache (LRU, 100MB)
        this.l1 = new LRUCache({ max: 10000, maxSize: 100 * 1024 * 1024 });

        // L2: Redis distributed cache (1 hour TTL)
        this.l2 = new Redis(config.redis);

        // L3: CDN edge cache (24 hour TTL)
        this.l3 = new CloudfrontCache(config.cloudfront);
    }

    async get(key) {
        // Check L1
        let value = this.l1.get(key);
        if (value) {
            this.metrics.l1Hits.inc();
            return value;
        }

        // Check L2
        value = await this.l2.get(key);
        if (value) {
            this.metrics.l2Hits.inc();
            this.l1.set(key, value);
            return JSON.parse(value);
        }

        // Check L3
        value = await this.l3.get(key);
        if (value) {
            this.metrics.l3Hits.inc();
            this.l1.set(key, value);
            await this.l2.set(key, JSON.stringify(value), 'EX', 3600);
            return value;
        }

        this.metrics.cacheMisses.inc();
        return null;
    }

    async set(key, value, ttl) {
        // Write through all layers
        this.l1.set(key, value);
        await this.l2.set(key, JSON.stringify(value), 'EX', ttl);
        await this.l3.set(key, value, { ttl: ttl * 24 });
    }
}

class BatchProcessor {
    constructor(config) {
        this.batchSize = config.batchSize || 100;
        this.batchTimeout = config.batchTimeout || 1000;
        this.queue = [];
        this.timer = null;
    }

    async process(item) {
        return new Promise((resolve, reject) => {
            this.queue.push({ item, resolve, reject });

            if (this.queue.length >= this.batchSize) {
                this.flush();
            } else if (!this.timer) {
                this.timer = setTimeout(() => this.flush(), this.batchTimeout);
            }
        });
    }

    async flush() {
        if (this.timer) {
            clearTimeout(this.timer);
            this.timer = null;
        }

        const batch = this.queue.splice(0, this.batchSize);
        if (batch.length === 0) return;

        try {
            // Process all items in parallel
            const results = await Promise.all(
                batch.map(({ item }) => this.processItem(item))
            );

            // Resolve promises
            batch.forEach(({ resolve }, i) => resolve(results[i]));

        } catch (error) {
            // Reject all on failure
            batch.forEach(({ reject }) => reject(error));
        }
    }

    async processItem(item) {
        // Actual processing logic
        return await this.service.authenticate(item);
    }
}

// Prometheus metrics definition
import { register, Counter, Histogram, Gauge } from 'prom-client';

const metrics = {
    // Throughput metrics
    authenticationsTotal: new Counter({
        name: 'auth_authentications_total',
        help: 'Total number of authentication requests',
        labelNames: ['status', 'content_type']
    }),

    verificationsTotal: new Counter({
        name: 'auth_verifications_total',
        help: 'Total number of verification requests',
        labelNames: ['result', 'content_type']
    }),

    // Latency metrics
    authenticationDuration: new Histogram({
        name: 'auth_authentication_duration_seconds',
        help: 'Authentication request duration',
        buckets: [0.1, 0.5, 1, 2, 5, 10]
    }),

    verificationDuration: new Histogram({
        name: 'auth_verification_duration_seconds',
        help: 'Verification request duration',
        buckets: [0.05, 0.1, 0.25, 0.5, 1, 2]
    }),

    // Accuracy metrics
    detectionAccuracy: new Gauge({
        name: 'auth_detection_accuracy',
        help: 'Deepfake detection accuracy'
    }),

    falsePositiveRate: new Gauge({
        name: 'auth_false_positive_rate',
        help: 'Detection false positive rate'
    }),

    falseNegativeRate: new Gauge({
        name: 'auth_false_negative_rate',
        help: 'Detection false negative rate'
    }),

    // Resource metrics
    storageUsage: new Gauge({
        name: 'auth_storage_bytes',
        help: 'Storage usage in bytes',
        labelNames: ['store_type']
    }),

    queueDepth: new Gauge({
        name: 'auth_queue_depth',
        help: 'Number of items in processing queue',
        labelNames: ['queue_name']
    }),

    // Business metrics
    authenticatedContent: new Counter({
        name: 'auth_content_authenticated_total',
        help: 'Total content items authenticated',
        labelNames: ['ai_generated']
    }),

    deepfakesDetected: new Counter({
        name: 'auth_deepfakes_detected_total',
        help: 'Total deepfakes detected'
    })
};

// Middleware to track metrics
app.use((req, res, next) => {
    const start = Date.now();

    res.on('finish', () => {
        const duration = (Date.now() - start) / 1000;

        metrics.authenticationsTotal.inc({
            status: res.statusCode,
            content_type: req.body.content_type
        });

        metrics.authenticationDuration.observe(duration);
    });

    next();
});

import { trace, context } from '@opentelemetry/api';
import { JaegerExporter } from '@opentelemetry/exporter-jaeger';

const tracer = trace.getTracer('auth-service');

async function authenticateWithTracing(content, metadata) {
    const span = tracer.startSpan('authenticate');

    span.setAttributes({
        'content.type': metadata.type,
        'content.size': content.length,
        'user.id': metadata.userId
    });

    try {
        const ctx = trace.setSpan(context.active(), span);

        return await context.with(ctx, async () => {
            // Child spans are automatically linked
            const fingerprint = await this.generateFingerprint(content);
            const detection = await this.runDetection(content);
            const manifest = await this.createManifest(content, metadata);

            span.setStatus({ code: SpanStatusCode.OK });
            return { fingerprint, detection, manifest };
        });

    } catch (error) {
        span.setStatus({
            code: SpanStatusCode.ERROR,
            message: error.message
        });
        span.recordException(error);
        throw error;

    } finally {
        span.end();
    }
}

// Role-based access control (RBAC)
const roles = {
    ADMIN: {
        permissions: ['auth:*', 'verify:*', 'keys:*', 'metrics:*']
    },
    OPERATOR: {
        permissions: ['auth:create', 'verify:read', 'metrics:read']
    },
    VIEWER: {
        permissions: ['verify:read', 'metrics:read']
    },
    API_CLIENT: {
        permissions: ['auth:create', 'verify:read'],
        rateLimit: { rpm: 1000, daily: 100000 }
    }
};

function checkPermission(user, action) {
    const userRole = roles[user.role];
    if (!userRole) return false;

    return userRole.permissions.some(perm => {
        if (perm === action) return true;
        if (perm.endsWith(':*')) {
            return action.startsWith(perm.slice(0, -1));
        }
        return false;
    });
}

// API authentication middleware
async function authenticate(req, res, next) {
    const token = req.headers.authorization?.replace('Bearer ', '');

    if (!token) {
        return res.status(401).json({ error: 'Missing token' });
    }

    try {
        // Verify JWT
        const payload = await verifyJWT(token, publicKey);

        // Check revocation
        const isRevoked = await checkRevocation(payload.jti);
        if (isRevoked) {
            return res.status(401).json({ error: 'Token revoked' });
        }

        // Attach user to request
        req.user = payload;
        next();

    } catch (error) {
        return res.status(401).json({ error: 'Invalid token' });
    }
}

// Rate limiting
const rateLimiter = new RateLimiter();

async function rateLimit(req, res, next) {
    const limit = roles[req.user.role].rateLimit;

    const [allowed, remaining] = await rateLimiter.check(
        req.user.id,
        limit
    );

    res.setHeader('X-RateLimit-Remaining', remaining);

    if (!allowed) {
        return res.status(429).json({ error: 'Rate limit exceeded' });
    }

    next();
}

// Multi-region backup configuration
const backupStrategy = {
    // Database backups
    databases: {
        fingerprints: {
            frequency: 'hourly',
            retention: '30 days',
            regions: ['us-east-1', 'eu-west-1', 'ap-southeast-1'],
            pointInTimeRecovery: true
        },
        provenance: {
            frequency: 'continuous',
            retention: '7 years', // Regulatory requirement
            regions: ['us-east-1', 'eu-west-1'],
            immutable: true
        }
    },

    // HSM key backups
    keys: {
        frequency: 'weekly',
        encryption: 'AES-256-GCM',
        multiPartyRecovery: true,
        offlineStorage: true
    },

    // Configuration backups
    configs: {
        versionControl: 'git',
        regions: ['us-east-1', 'eu-west-1'],
        automated: true
    }
};

// Automated recovery testing
async function testDisasterRecovery() {
    const testScenarios = [
        'regional_outage',
        'database_corruption',
        'key_compromise',
        'ddos_attack'
    ];

    for (const scenario of testScenarios) {
        console.log(`Testing scenario: ${scenario}`);

        // Execute recovery procedure
        await executeRecoveryPlan(scenario);

        // Validate system health
        const healthy = await validateSystemHealth();

        if (!healthy) {
            throw new Error(`Recovery failed for ${scenario}`);
        }

        // Restore to normal state
        await restoreNormalOperation();
    }
}