Security Architecture

9. Security Architecture

This document provides a comprehensive overview of how the ProgNetwork system is secured, including authentication, authorization, encryption, secrets management, and network-level protections.

Authentication Architecture

Multi-Layer Authentication Strategy

1. API Gateway Authentication

Purpose: First line of defense for all external requests Implementation: JWT tokens with OAuth2 support

// API Gateway authentication middleware
const authMiddleware = async (request: NextRequest): Promise<NextResponse | null> => {
  const token = extractBearerToken(request);

  if (!token) {
    return createUnauthorizedResponse('Missing authentication token');
  }

  try {
    // Verify JWT signature and claims
    const decoded = await verifyJWT(token);

    // Add user context to request headers
    request.headers.set('x-user-id', decoded.userId);
    request.headers.set('x-tenant-id', decoded.tenantId);
    request.headers.set('x-user-roles', JSON.stringify(decoded.roles));

    return null; // Continue processing
  } catch (error) {
    return createUnauthorizedResponse('Invalid authentication token');
  }
};

Authentication Features:

  • Stateless JWT-based authentication
  • OAuth2 integration for social login
  • API key authentication for service accounts
  • Token refresh and rotation mechanisms

2. Service-Level Authentication

Purpose: Verify service-to-service communication Implementation: mTLS certificates and service tokens

// Service authentication middleware
const serviceAuthMiddleware = async (request: NextRequest): Promise<boolean> => {
  // Extract client certificate
  const clientCert = request.headers.get('x-client-cert');

  if (!clientCert) {
    return false;
  }

  // Verify certificate against trusted CA
  const isValid = await verifyClientCertificate(clientCert);

  if (!isValid) {
    return false;
  }

  // Verify service authorization
  const serviceName = extractServiceName(clientCert);
  const allowedServices = await getAllowedServices(request.url);

  return allowedServices.includes(serviceName);
};

Service Auth Features:

  • Certificate-based mutual authentication
  • Service authorization policies
  • Automated certificate rotation
  • Audit logging of service access

3. Database-Level Authentication

Purpose: Secure data access at the database layer Implementation: Row-level security and connection authentication

-- Enable row-level security
ALTER TABLE users ENABLE ROW LEVEL SECURITY;

-- Create policy for tenant isolation
CREATE POLICY tenant_isolation ON users
  FOR ALL USING (tenant_id = current_setting('app.current_tenant'));

-- Set tenant context for each request
SET app.current_tenant = 'tenant-123';

Database Security Features:

  • Row-level security for multi-tenancy
  • Connection pooling with authentication
  • Query auditing and logging
  • Database user privilege management

Authorization Model

Role-Based Access Control (RBAC)

Role Definition
interface Role {
  id: string;
  name: string;
  permissions: Permission[];
  scope: 'global' | 'tenant' | 'user';
}

interface Permission {
  resource: string;     // e.g., 'users', 'payments', 'settings'
  actions: string[];    // e.g., ['read', 'write', 'delete', 'admin']
  conditions?: string[]; // Optional conditions for access
}

Role Examples:

const roles = {
  superAdmin: {
    id: 'super-admin',
    name: 'Super Administrator',
    permissions: [
      { resource: '*', actions: ['*'] }
    ],
    scope: 'global',
  },
  tenantAdmin: {
    id: 'tenant-admin',
    name: 'Tenant Administrator',
    permissions: [
      { resource: 'users', actions: ['read', 'write', 'delete'] },
      { resource: 'settings', actions: ['read', 'write'] },
      { resource: 'billing', actions: ['read'] },
    ],
    scope: 'tenant',
  },
  user: {
    id: 'user',
    name: 'Standard User',
    permissions: [
      { resource: 'profile', actions: ['read', 'write'] },
    ],
    scope: 'user',
  },
};
Authorization Middleware
// Express-style authorization middleware
const authorize = (requiredPermissions: string[]) => {
  return async (request: NextRequest): Promise<boolean> => {
    const userRoles = getUserRoles(request);
    const userPermissions = await getUserPermissions(userRoles);

    return requiredPermissions.every(permission =>
      userPermissions.some(userPerm =>
        userPerm.resource === permission.resource &&
        userPerm.actions.includes(permission.action)
      )
    );
  };
};

// Usage in API routes
const handler = async (request: NextRequest) => {
  if (!(await authorize([{ resource: 'users', action: 'read' }])(request))) {
    return createForbiddenResponse('Insufficient permissions');
  }

  // Handle authorized request
};

Authorization Benefits:

  • Granular permission control
  • Multi-tenant access isolation
  • Hierarchical role management
  • Audit trail of access decisions

Attribute-Based Access Control (ABAC)

Dynamic Authorization
interface AccessContext {
  user: User;
  resource: Resource;
  action: string;
  environment: {
    time: Date;
    location: string;
    device: string;
    riskScore: number;
  };
}

class ABACEngine {
  async evaluateAccess(context: AccessContext): Promise<boolean> {
    const policies = await this.getApplicablePolicies(context);

    for (const policy of policies) {
      if (await this.evaluatePolicy(policy, context)) {
        return policy.effect === 'allow';
      }
    }

    return false; // Default deny
  }

  private async evaluatePolicy(policy: Policy, context: AccessContext): Promise<boolean> {
    // Evaluate policy conditions
    for (const condition of policy.conditions) {
      if (!(await this.evaluateCondition(condition, context))) {
        return false;
      }
    }

    return true;
  }
}

ABAC Benefits:

  • Context-aware access decisions
  • Dynamic policy evaluation
  • Risk-based access control
  • Fine-grained authorization logic

Encryption Strategy

Data at Rest Encryption

Database Encryption

# PostgreSQL encryption configuration
postgresql:
  parameters:
    # Enable data encryption
    shared_preload_libraries: 'pgcrypto'
    # Encrypt specific columns
    pgcrypto.encrypt_columns: 'credit_card_numbers, ssn, medical_data'
    # Enable transparent data encryption
    data_directory: '/var/lib/postgresql/data'
    # Encryption key management
    encryption_key_command: '/usr/local/bin/get-encryption-key.sh'

Encryption Implementation:

  • Transparent data encryption (TDE) for database files
  • Column-level encryption for sensitive data
  • Encryption key rotation policies
  • Secure key storage and access

File System Encryption

# Encrypted file system configuration
kind: PersistentVolumeClaim
metadata:
  name: encrypted-storage
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 100Gi
  storageClassName: encrypted-storage-class

Storage Security:

  • Encrypted block storage for persistent data
  • Key management service integration
  • Secure data deletion and wiping
  • Backup encryption for data in transit

Data in Transit Encryption

TLS/SSL Configuration

# TLS configuration for services
tls:
  enabled: true
  version: "1.3"
  cipher_suites:
  - "TLS_AES_128_GCM_SHA256"
  - "TLS_AES_256_GCM_SHA384"
  - "TLS_CHACHA20_POLY1305_SHA256"
  certificates:
    type: "auto"  # Let's Encrypt integration
    # Manual certificate configuration
    # type: "manual"
    # cert_file: "/etc/ssl/certs/server.crt"
    # key_file: "/etc/ssl/private/server.key"

Transport Security:

  • TLS 1.3 for all communications
  • Perfect forward secrecy (PFS)
  • Certificate pinning for high-security endpoints
  • HSTS headers for HTTP security

Service Mesh Encryption

# mTLS configuration for service mesh
apiVersion: security.istio.io/v1beta1
kind: PeerAuthentication
metadata:
  name: default
  namespace: prog-production
spec:
  selector:
    matchLabels:
      app: user-service
  mtls:
    mode: STRICT  # Require mTLS for all communications

mTLS Benefits:

  • End-to-end encryption between services
  • Service identity verification
  • Protection against man-in-the-middle attacks
  • Automated certificate management

Secrets Management

Secrets Storage and Access

AWS Secrets Manager Integration

// Secrets Manager client configuration
class SecretsManager {
  private client: AWS.SecretsManager;
  private cache: Map<string, any> = new Map();

  constructor() {
    this.client = new AWS.SecretsManager({
      region: process.env.AWS_REGION,
    });
  }

  async getSecret(secretName: string): Promise<any> {
    // Check cache first
    if (this.cache.has(secretName)) {
      return this.cache.get(secretName);
    }

    try {
      const result = await this.client.getSecretValue({
        SecretId: secretName,
      }).promise();

      const secret = JSON.parse(result.SecretString || '{}');
      this.cache.set(secretName, secret);

      return secret;
    } catch (error) {
      logger.error('Failed to retrieve secret', { secretName, error });
      throw error;
    }
  }

  async setSecret(secretName: string, secretValue: any): Promise<void> {
    await this.client.updateSecret({
      SecretId: secretName,
      SecretString: JSON.stringify(secretValue),
    }).promise();

    // Invalidate cache
    this.cache.delete(secretName);
  }
}

Secrets Manager Features:

  • Encrypted secret storage
  • Automatic secret rotation
  • Access logging and auditing
  • Integration with IAM policies

Kubernetes Secrets

# Kubernetes secret definition
apiVersion: v1
kind: Secret
metadata:
  name: database-credentials
  namespace: prog-production
type: Opaque
data:
  username: <base64-encoded-username>
  password: <base64-encoded-password>
  connection-string: <base64-encoded-connection-string>

Secret Types:

  • Opaque secrets for custom data
  • TLS secrets for certificates
  • Docker registry secrets for image pulls
  • Service account tokens for API access

Key Rotation Strategy

Automated Key Rotation

class KeyRotationManager {
  async rotateEncryptionKeys(): Promise<void> {
    // Generate new encryption key
    const newKey = await this.generateEncryptionKey();

    // Update all services with new key
    await this.distributeNewKey(newKey);

    // Re-encrypt data with new key (background process)
    await this.scheduleDataReEncryption();

    // Mark old key for deletion after grace period
    await this.scheduleOldKeyDeletion();
  }

  private async distributeNewKey(newKey: string): Promise<void> {
    // Update Secrets Manager
    await this.secretsManager.setSecret('encryption-key', newKey);

    // Update all running services via service mesh
    await this.serviceMesh.updateServiceConfig({
      encryptionKey: newKey,
    });

    // Update Kubernetes secrets
    await this.updateKubernetesSecrets(newKey);
  }
}

Rotation Schedule:

  • Database encryption keys: 90 days
  • API signing keys: 30 days
  • Session encryption keys: 7 days
  • TLS certificates: 90 days

Network Security

Network Architecture

VPC Security

# VPC configuration with security
Resources:
  VPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      EnableDnsSupport: true
      EnableDnsHostnames: true

  # Public subnet for load balancers
  PublicSubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      CidrBlock: 10.0.1.0/24
      MapPublicIpOnLaunch: true

  # Private subnet for application services
  PrivateSubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      CidrBlock: 10.0.2.0/24
      MapPublicIpOnLaunch: false

  # Database subnet (isolated)
  DatabaseSubnet:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      CidrBlock: 10.0.3.0/24
      MapPublicIpOnLaunch: false

Network Segmentation:

  • Public subnets for internet-facing services
  • Private subnets for internal services
  • Isolated subnets for sensitive data
  • NAT gateways for controlled outbound access

Security Groups

# Application security group
ApplicationSecurityGroup:
  Type: AWS::EC2::SecurityGroup
  Properties:
    GroupDescription: Security group for application services
    VpcId: !Ref VPC
    SecurityGroupIngress:
    - IpProtocol: tcp
      FromPort: 3000
      ToPort: 3007
      SourceSecurityGroupId: !Ref LoadBalancerSecurityGroup
    - IpProtocol: tcp
      FromPort: 22
      ToPort: 22
      SourceSecurityGroupId: !Ref BastionSecurityGroup

Security Group Strategy:

  • Least privilege access patterns
  • Service-specific security groups
  • Regular security group audits
  • Integration with service mesh policies

Web Application Firewall (WAF)

AWS WAF Configuration

# WAF WebACL for API Gateway
Resources:
  WebACL:
    Type: AWS::WAFv2::WebACL
    Properties:
      Name: ProgNetworkWebACL
      Scope: REGIONAL
      DefaultAction:
        Allow: {}
      Rules:
      - Name: RateLimitRule
        Priority: 1
        Action:
          Block: {}
        Statement:
          RateBasedStatement:
            Limit: 1000
            AggregateKeyType: IP
      - Name: SQLInjectionRule
        Priority: 2
        Action:
          Block: {}
        Statement:
          ManagedRuleGroupStatement:
            VendorName: AWS
            Name: AWSManagedRulesSQLiRuleSet
      - Name: XSSRule
        Priority: 3
        Action:
          Block: {}
        Statement:
          ManagedRuleGroupStatement:
            VendorName: AWS
            Name: AWSManagedRulesKnownBadInputsRuleSet

WAF Features:

  • Rate limiting to prevent abuse
  • SQL injection protection
  • Cross-site scripting (XSS) prevention
  • Geographic blocking capabilities
  • Custom rule creation for specific threats

Access Control and Auditing

Audit Logging

Comprehensive Audit Trail

interface AuditEvent {
  id: string;
  timestamp: Date;
  userId?: string;
  tenantId?: string;
  service: string;
  action: string;
  resource: string;
  result: 'success' | 'failure' | 'error';
  details: Record<string, any>;
  ipAddress: string;
  userAgent: string;
  correlationId: string;
}

class AuditLogger {
  async logEvent(event: AuditEvent): Promise<void> {
    // Add metadata
    const enrichedEvent = {
      ...event,
      id: uuidv4(),
      timestamp: new Date(),
      service: this.serviceName,
    };

    // Log to multiple destinations
    await Promise.all([
      this.logToDatabase(enrichedEvent),
      this.logToSyslog(enrichedEvent),
      this.logToCloudWatch(enrichedEvent),
    ]);

    // Publish for real-time monitoring
    await this.eventPublisher.publish({
      type: 'audit.event',
      data: enrichedEvent,
    });
  }
}

Audit Events:

  • Authentication attempts (success/failure)
  • Authorization decisions
  • Data access and modifications
  • Configuration changes
  • Security policy violations

Intrusion Detection and Response

Security Monitoring

class SecurityMonitor {
  async detectAnomalies(): Promise<SecurityAlert[]> {
    const alerts = [];

    // Check for unusual login patterns
    const suspiciousLogins = await this.detectSuspiciousLogins();
    alerts.push(...suspiciousLogins);

    // Check for data exfiltration attempts
    const dataExfiltration = await this.detectDataExfiltration();
    alerts.push(...dataExfiltration);

    // Check for privilege escalation attempts
    const privilegeEscalation = await this.detectPrivilegeEscalation();
    alerts.push(...privilegeEscalation);

    return alerts;
  }

  private async detectSuspiciousLogins(): Promise<SecurityAlert[]> {
    const recentLogins = await this.getRecentLoginAttempts();

    return recentLogins
      .filter(login =>
        login.failedAttempts > 5 ||
        login.geographicDispersion > 1000 || // km
        login.unusualTimePattern
      )
      .map(login => ({
        type: 'suspicious_login',
        severity: 'high',
        description: `Suspicious login pattern detected for user ${login.userId}`,
        details: login,
      }));
  }
}

Detection Capabilities:

  • Unusual login patterns and geographic anomalies
  • Data access pattern analysis
  • Privilege escalation detection
  • DDoS attack identification

Incident Response

Automated Response Actions

class IncidentResponder {
  async respondToIncident(alert: SecurityAlert): Promise<void> {
    switch (alert.type) {
      case 'suspicious_login':
        await this.handleSuspiciousLogin(alert);
        break;
      case 'data_exfiltration':
        await this.handleDataExfiltration(alert);
        break;
      case 'privilege_escalation':
        await this.handlePrivilegeEscalation(alert);
        break;
      case 'ddos_attack':
        await this.handleDDoSAttack(alert);
        break;
    }
  }

  private async handleSuspiciousLogin(alert: SecurityAlert): Promise<void> {
    // Lock user account temporarily
    await this.userService.lockAccount(alert.userId, 300000); // 5 minutes

    // Send alert to security team
    await this.alerting.sendSecurityAlert(alert);

    // Log incident for compliance
    await this.auditLogger.logSecurityIncident(alert);
  }
}

Response Actions:

  • Account locking and suspension
  • IP blocking and firewall updates
  • Alert notification to security teams
  • Compliance logging and reporting

Compliance and Standards

Security Standards Compliance

SOC 2 Type II Compliance

  • Security principle implementation
  • Availability monitoring and controls
  • Confidentiality data protection
  • Privacy rights management
  • Processing integrity validation

GDPR Compliance

  • Data protection by design and default
  • Privacy impact assessments
  • Data subject rights implementation
  • Breach notification procedures
  • Data processing records

PCI DSS Compliance (for Payment Service)

  • Cardholder data protection
  • Vulnerability management
  • Access control measures
  • Network monitoring and testing
  • Information security policies

Security Testing

Automated Security Testing

# Security testing in CI/CD pipeline
security-tests:
  - name: SAST (Static Application Security Testing)
    tool: semgrep
    config: security-rules.yaml

  - name: DAST (Dynamic Application Security Testing)
    tool: OWASP ZAP
    target: https://api.prognetwork.com

  - name: Dependency Scanning
    tool: npm audit
    severity: high

  - name: Container Security
    tool: trivy
    target: ./Dockerfile

  - name: Infrastructure Security
    tool: checkov
    target: ./infrastructure/

Testing Coverage:

  • Static code analysis for vulnerabilities
  • Dynamic testing for runtime issues
  • Dependency vulnerability scanning
  • Container and infrastructure security
  • Compliance rule validation

This comprehensive security architecture ensures that ProgNetwork maintains the highest standards of security across all layers of the application stack, protecting user data, maintaining compliance, and preventing security breaches.