Moai Security Encryption

Enterprise Encryption Security Expert v4.0.0

Skill Metadata

What It Does

Enterprise Encryption Security expert with AI-powered cryptographic architecture, Context7 integration, and intelligent encryption orchestration for comprehensive data protection.

Revolutionary v4.0.0 capabilities:

• 🤖 AI-Powered Encryption Architecture using Context7 MCP for latest cryptographic patterns
• 📊 Intelligent Key Management with automated rotation and lifecycle optimization
• 🚀 Advanced Cryptographic Implementation with AI-driven algorithm selection
• 🔗 Enterprise Security Framework with zero-configuration encryption deployment
• 📈 Predictive Security Analytics with threat assessment and compliance monitoring

When to Use

Automatic triggers:

• Encryption implementation and cryptographic security discussions
• Data protection and privacy compliance requirements analysis
• Key management and rotation strategy planning
• Secure communication and storage implementation

Manual invocation:

• Designing enterprise encryption architectures with optimal security
• Implementing comprehensive key management systems
• Planning cryptographic algorithms and security protocols
• Optimizing encryption performance and compliance

Quick Reference (Level 1)

Modern Encryption Stack (November 2025)

Core Cryptographic Algorithms

• AES-256-GCM: Symmetric encryption with authenticated encryption
• RSA-4096: Asymmetric encryption for key exchange and digital signatures
• ECC P-384: Elliptic curve cryptography for efficiency
• SHA-384: Cryptographic hashing for integrity verification
• HMAC-SHA256: Message authentication codes

Key Management Systems

• HashiCorp Vault: Enterprise secrets management
• AWS KMS: Cloud-based key management service
• Azure Key Vault: Microsoft cloud key management
• Kubernetes Secrets: Container-native secret storage
• Hardware Security Modules (HSM): Hardware-based key protection

Implementation Standards

• FIPS 140-2/3: Federal Information Processing Standards
• NIST SP 800-57: Key management guidelines
• PCI DSS: Payment card industry security standards
• GDPR: Data protection and privacy regulation
• HIPAA: Healthcare information protection

Security Features

• End-to-End Encryption: Complete data protection lifecycle
• Key Rotation: Automated key renewal and secure rotation
• Zero-Knowledge Architecture: Privacy-preserving encryption
• Quantum-Resistant: Preparation for quantum computing threats
• Audit Logging: Comprehensive security event tracking

Core Implementation (Level 2)

Encryption Architecture Intelligence

# AI-powered encryption architecture optimization with Context7
class EncryptionArchitectOptimizer:
    def __init__(self):
        self.context7_client = Context7Client()
        self.crypto_analyzer = CryptographicAnalyzer()
        self.security_validator = SecurityValidator()
    
    async def design_optimal_encryption_architecture(self, 
                                                   requirements: SecurityRequirements) -> EncryptionArchitecture:
        """Design optimal encryption architecture using AI analysis."""
        
        # Get latest cryptographic documentation via Context7
        crypto_docs = await self.context7_client.get_library_docs(
            context7_library_id='/cryptography/docs',
            topic="encryption algorithms key management security 2025",
            tokens=3000
        )
        
        security_docs = await self.context7_client.get_library_docs(
            context7_library_id='/security/docs',
            topic="data protection compliance best practices 2025",
            tokens=2000
        )
        
        # Optimize cryptographic algorithms
        algorithm_selection = self.crypto_analyzer.select_optimal_algorithms(
            requirements.data_classification,
            requirements.performance_requirements,
            crypto_docs
        )
        
        # Validate security requirements
        security_configuration = self.security_validator.configure_security(
            requirements.compliance_frameworks,
            requirements.threat_model,
            security_docs
        )
        
        return EncryptionArchitecture(
            algorithm_configuration=algorithm_selection,
            key_management_system=self._design_key_management(requirements),
            security_framework=security_configuration,
            implementation_patterns=self._select_implementation_patterns(requirements),
            compliance_integration=self._ensure_compliance(requirements),
            performance_optimization=self._optimize_performance(requirements)
        )

Advanced Encryption Implementation

// Enterprise-grade encryption with TypeScript
import crypto from 'crypto';
import { promisify } from 'util';

const randomBytes = promisify(crypto.randomBytes);
const pbkdf2 = promisify(crypto.pbkdf2);

interface EncryptionConfig {
  algorithm: string;
  keyLength: number;
  ivLength: number;
  tagLength: number;
  iterations: number;
  saltLength: number;
}

export class AdvancedEncryptionManager {
  private config: EncryptionConfig;
  private keyManager: KeyManager;

  constructor(config: Partial<EncryptionConfig> = {}) {
    this.config = {
      algorithm: 'aes-256-gcm',
      keyLength: 32,
      ivLength: 16,
      tagLength: 16,
      iterations: 100000,
      saltLength: 32,
      ...config,
    };

    this.keyManager = new KeyManager();
  }

  async encrypt(plaintext: string, keyId?: string): Promise<EncryptedData> {
    try {
      // Get or derive encryption key
      const key = await this.keyManager.getKey(keyId);
      
      // Generate random salt and IV
      const salt = await randomBytes(this.config.saltLength);
      const iv = await randomBytes(this.config.ivLength);
      
      // Create cipher
      const cipher = crypto.createCipher(this.config.algorithm, key);
      cipher.setAAD(salt); // Additional authenticated data
      
      let encrypted = cipher.update(plaintext, 'utf8', 'hex');
      encrypted += cipher.final('hex');
      
      const tag = cipher.getAuthTag();
      
      return {
        encrypted,
        salt: salt.toString('hex'),
        iv: iv.toString('hex'),
        tag: tag.toString('hex'),
        algorithm: this.config.algorithm,
        keyId,
        timestamp: new Date().toISOString(),
      };
    } catch (error) {
      throw new Error(`Encryption failed: ${error.message}`);
    }
  }

  async decrypt(encryptedData: EncryptedData): Promise<string> {
    try {
      // Get decryption key
      const key = await this.keyManager.getKey(encryptedData.keyId);
      
      // Create decipher
      const decipher = crypto.createDecipher(
        encryptedData.algorithm,
        key
      );
      
      // Set parameters
      decipher.setAAD(Buffer.from(encryptedData.salt, 'hex'));
      decipher.setAuthTag(Buffer.from(encryptedData.tag, 'hex'));
      
      let decrypted = decipher.update(encryptedData.encrypted, 'hex', 'utf8');
      decrypted += decipher.final('utf8');
      
      return decrypted;
    } catch (error) {
      throw new Error(`Decryption failed: ${error.message}`);
    }
  }

  async encryptFile(
    inputPath: string,
    outputPath: string,
    keyId?: string
  ): Promise<FileEncryptionResult> {
    const fs = require('fs').promises;
    
    try {
      // Read file
      const fileData = await fs.readFile(inputPath);
      const fileStats = await fs.stat(inputPath);
      
      // Generate salt and IV
      const salt = await randomBytes(this.config.saltLength);
      const iv = await randomBytes(this.config.ivLength);
      
      // Get encryption key
      const key = await this.keyManager.getKey(keyId);
      
      // Create cipher
      const cipher = crypto.createCipher(this.config.algorithm, key);
      cipher.setAAD(salt);
      
      // Encrypt file in streaming mode
      const inputStream = fs.createReadStream(inputPath);
      const outputStream = fs.createWriteStream(outputPath);
      
      // Write header
      outputStream.write(JSON.stringify({
        salt: salt.toString('hex'),
        iv: iv.toString('hex'),
        algorithm: this.config.algorithm,
        originalSize: fileStats.size,
        keyId,
      }) + '\n');
      
      // Pipe encryption
      inputStream.pipe(cipher).pipe(outputStream);
      
      return new Promise((resolve, reject) => {
        outputStream.on('finish', () => {
          resolve({
            outputPath,
            originalSize: fileStats.size,
            encryptedSize: fileStats.size + this.config.saltLength + this.config.ivLength,
            keyId,
          });
        });
        
        outputStream.on('error', reject);
      });
    } catch (error) {
      throw new Error(`File encryption failed: ${error.message}`);
    }
  }
}

// Advanced key management system
class KeyManager {
  private keyStore: Map<string, CryptoKey> = new Map();
  private rotationSchedule: Map<string, Date> = new Map();

  async generateKey(keyId: string, algorithm: string = 'aes-256-gcm'): Promise<string> {
    const key = await randomBytes(32); // 256-bit key
    
    // Store key securely (in production, use HSM or KMS)
    this.keyStore.set(keyId, key);
    
    // Set rotation schedule (30 days)
    const rotationDate = new Date();
    rotationDate.setDate(rotationDate.getDate() + 30);
    this.rotationSchedule.set(keyId, rotationDate);
    
    return keyId;
  }

  async getKey(keyId?: string): Promise<Buffer> {
    if (!keyId) {
      // Generate default key
      return await randomBytes(32);
    }

    const key = this.keyStore.get(keyId);
    if (!key) {
      throw new Error(`Key not found: ${keyId}`);
    }

    // Check if key needs rotation
    const rotationDate = this.rotationSchedule.get(keyId);
    if (rotationDate && rotationDate <= new Date()) {
      await this.rotateKey(keyId);
      return this.keyStore.get(keyId)!;
    }

    return key;
  }

  private async rotateKey(keyId: string): Promise<void> {
    // Generate new key
    const newKey = await randomBytes(32);
    
    // Store new key
    this.keyStore.set(keyId, newKey);
    
    // Update rotation schedule
    const rotationDate = new Date();
    rotationDate.setDate(rotationDate.getDate() + 30);
    this.rotationSchedule.set(keyId, rotationDate);
    
    console.log(`Key rotated: ${keyId}`);
  }

  async deriveKeyFromPassword(
    password: string,
    salt: Buffer,
    iterations: number = 100000
  ): Promise<Buffer> {
    return await pbkdf2(password, salt, iterations, 32, 'sha256') as Buffer;
  }

  async generateKeyPair(keyId: string): Promise<KeyPair> {
    const { publicKey, privateKey } = crypto.generateKeyPairSync('rsa', {
      modulusLength: 4096,
      publicKeyEncoding: {
        type: 'spki',
        format: 'pem',
      },
      privateKeyEncoding: {
        type: 'pkcs8',
        format: 'pem',
      },
    });

    return {
      keyId,
      publicKey,
      privateKey,
      algorithm: 'rsa-4096',
    };
  }
}

// Digital signature implementation
export class DigitalSignature {
  private keyManager: KeyManager;

  constructor() {
    this.keyManager = new KeyManager();
  }

  async sign(data: string, privateKeyId: string): Promise<DigitalSignature> {
    try {
      const privateKey = await this.keyManager.getPrivateKey(privateKeyId);
      const sign = crypto.createSign('RSA-SHA256');
      
      sign.update(data);
      const signature = sign.sign(privateKey, 'hex');
      
      return {
        data,
        signature,
        algorithm: 'RSA-SHA256',
        keyId: privateKeyId,
        timestamp: new Date().toISOString(),
      };
    } catch (error) {
      throw new Error(`Signing failed: ${error.message}`);
    }
  }

  async verify(signature: DigitalSignature, publicKeyId: string): Promise<boolean> {
    try {
      const publicKey = await this.keyManager.getPublicKey(publicKeyId);
      const verify = crypto.createVerify('RSA-SHA256');
      
      verify.update(signature.data);
      return verify.verify(publicKey, signature.signature, 'hex');
    } catch (error) {
      return false;
    }
  }
}

Secure Communication Implementation

import ssl
import socket
from typing import Optional, Tuple
from cryptography.hazmat.primitives.asymmetric import rsa, padding
from cryptography.hazmat.primitives import serialization, hashes
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.backends import default_backend

class SecureCommunication:
    def __init__(self):
        self.backend = default_backend()
        self.certificate_manager = CertificateManager()
    
    def create_secure_context(self, 
                            cert_path: str,
                            key_path: str,
                            ca_path: Optional[str] = None) -> ssl.SSLContext:
        """Create SSL/TLS context for secure communication."""
        
        context = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
        
        # Load certificate and private key
        context.load_cert_chain(certfile=cert_path, keyfile=key_path)
        
        # Configure cipher suites
        context.set_ciphers('ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384')
        
        # Set minimum TLS version
        context.minimum_version = ssl.TLSVersion.TLSv1_2
        
        # Enable HSTS
        context.set_alpn_protocols(['h2', 'http/1.1'])
        
        if ca_path:
            context.load_verify_locations(cafile=ca_path)
            context.verify_mode = ssl.CERT_REQUIRED
        
        return context
    
    def create_secure_socket(self, 
                           host: str, 
                           port: int,
                           context: ssl.SSLContext) -> ssl.SSLSocket:
        """Create secure socket with TLS encryption."""
        
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        secure_sock = context.wrap_socket(sock, server_hostname=host)
        
        try:
            secure_sock.connect((host, port))
            return secure_sock
        except Exception as e:
            secure_sock.close()
            raise e

class CertificateManager:
    def __init__(self):
        self.backend = default_backend()
    
    def generate_self_signed_certificate(self, 
                                      common_name: str,
                                      organization: str,
                                      valid_days: int = 365) -> Tuple[bytes, bytes]:
        """Generate self-signed certificate for testing."""
        
        from cryptography import x509
        from cryptography.x509.oid import NameOID
        
        # Generate private key
        private_key = rsa.generate_private_key(
            public_exponent=65537,
            key_size=2048,
            backend=self.backend
        )
        
        # Create certificate
        subject = issuer = x509.Name([
            x509.NameAttribute(NameOID.COUNTRY_NAME, "US"),
            x509.NameAttribute(NameOID.STATE_OR_PROVINCE_NAME, "California"),
            x509.NameAttribute(NameOID.LOCALITY_NAME, "San Francisco"),
            x509.NameAttribute(NameOID.ORGANIZATION_NAME, organization),
            x509.NameAttribute(NameOID.COMMON_NAME, common_name),
        ])
        
        cert = x509.CertificateBuilder().subject_name(
            subject
        ).issuer_name(
            issuer
        ).public_key(
            private_key.public_key()
        ).serial_number(
            x509.random_serial_number()
        ).not_valid_before(
            datetime.datetime.utcnow()
        ).not_valid_after(
            datetime.datetime.utcnow() + datetime.timedelta(days=valid_days)
        ).add_extension(
            x509.SubjectAlternativeName([
                x509.DNSName(common_name),
                x509.IPAddress(ipaddress.IPv4Address("127.0.0.1")),
            ]),
            critical=False,
        ).sign(private_key, hashes.SHA256(), self.backend)
        
        # Serialize certificate and key
        cert_pem = cert.public_bytes(serialization.Encoding.PEM)
        key_pem = private_key.private_bytes(
            encoding=serialization.Encoding.PEM,
            format=serialization.PrivateFormat.PKCS8,
            encryption_algorithm=serialization.NoEncryption()
        )
        
        return cert_pem, key_pem

Advanced Implementation (Level 3)

Enterprise Key Management

// Enterprise key management with HSM integration
export class EnterpriseKeyManager {
  private hsmClient: HSMClient;
  private keyRotation: KeyRotationService;
  private auditLogger: AuditLogger;

  constructor(hsmConfig: HSMConfig) {
    this.hsmClient = new HSMClient(hsmConfig);
    this.keyRotation = new KeyRotationService();
    this.auditLogger = new AuditLogger();
  }

  async createEncryptionKey(
    keyId: string,
    algorithm: string = 'AES-256-GCM',
    metadata?: KeyMetadata
  ): Promise<CreatedKey> {
    try {
      // Log key creation attempt
      this.auditLogger.log('KEY_CREATION_ATTEMPT', { keyId, algorithm });

      // Create key in HSM
      const hsmKey = await this.hsmClient.createKey({
        algorithm,
        keyId,
        extractable: false,
        sensitive: true,
        ...metadata,
      });

      // Set up rotation schedule
      await this.keyRotation.scheduleRotation(keyId, {
        rotationInterval: 90, // days
        algorithm: algorithm,
      });

      // Log successful creation
      this.auditLogger.log('KEY_CREATED', { keyId, hsmKeyId: hsmKey.id });

      return {
        keyId,
        hsmKeyId: hsmKey.id,
        algorithm,
        created: new Date(),
        nextRotation: await this.keyRotation.getNextRotationDate(keyId),
      };
    } catch (error) {
      this.auditLogger.log('KEY_CREATION_FAILED', { 
        keyId, 
        error: error.message 
      });
      throw error;
    }
  }

  async encryptWithHSM(
    keyId: string,
    plaintext: Buffer,
    additionalData?: Buffer
  ): Promise<EncryptedWithHSM> {
    try {
      // Get key from HSM
      const hsmKey = await this.hsmClient.getKey(keyId);
      
      // Perform encryption in HSM
      const result = await this.hsmClient.encrypt({
        keyId: hsmKey.id,
        plaintext,
        additionalData,
      });

      // Log encryption operation
      this.auditLogger.log('ENCRYPTION_PERFORMED', { 
        keyId, 
        dataSize: plaintext.length 
      });

      return {
        ciphertext: result.ciphertext,
        iv: result.iv,
        tag: result.tag,
        keyId,
        timestamp: new Date(),
      };
    } catch (error) {
      this.auditLogger.log('ENCRYPTION_FAILED', { 
        keyId, 
        error: error.message 
      });
      throw error;
    }
  }

  async rotateKey(keyId: string): Promise<KeyRotationResult> {
    try {
      // Get current key
      const currentKey = await this.hsmClient.getKey(keyId);
      
      // Create new key
      const newKeyId = `${keyId}_rotated_${Date.now()}`;
      const newKey = await this.createEncryptionKey(
        newKeyId,
        currentKey.algorithm
      );

      // Schedule deprecation of old key
      await this.keyRotation.deprecateKey(keyId, {
        deprecationDate: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000), // 30 days
        replacementKeyId: newKeyId,
      });

      // Log rotation
      this.auditLogger.log('KEY_ROTATED', { 
        oldKeyId: keyId, 
        newKeyId,
        rotationDate: new Date(),
      });

      return {
        oldKeyId: keyId,
        newKeyId,
        deprecationDate: await this.keyRotation.getDeprecationDate(keyId),
      };
    } catch (error) {
      this.auditLogger.log('KEY_ROTATION_FAILED', { 
        keyId, 
        error: error.message 
      });
      throw error;
    }
  }
}

// Compliance and audit integration
class ComplianceAuditor {
  private auditLog: AuditLog;
  private complianceRules: ComplianceRule[];

  constructor() {
    this.auditLog = new AuditLog();
    this.complianceRules = [
      new GDPRComplianceRule(),
      new PCIComplianceRule(),
      new HIPAAComplianceRule(),
    ];
  }

  async auditEncryptionOperations(
    timeRange: TimeRange
  ): Promise<AuditReport> {
    // Get audit log entries
    const entries = await this.auditLog.getEntries(timeRange);
    
    // Apply compliance rules
    const complianceResults = [];
    for (const rule of this.complianceRules) {
      const result = await rule.validate(entries);
      complianceResults.push(result);
    }

    // Generate report
    return {
      timeRange,
      totalOperations: entries.length,
      complianceResults,
      violations: this.identifyViolations(entries),
      recommendations: this.generateRecommendations(complianceResults),
    };
  }

  private identifyViolations(entries: AuditEntry[]): SecurityViolation[] {
    const violations = [];

    for (const entry of entries) {
      // Check for suspicious patterns
      if (this.isSuspiciousPattern(entry)) {
        violations.push({
          type: 'SUSPICIOUS_PATTERN',
          entry,
          severity: 'HIGH',
          description: 'Suspicious encryption operation detected',
        });
      }

      // Check for policy violations
      if (this.isPolicyViolation(entry)) {
        violations.push({
          type: 'POLICY_VIOLATION',
          entry,
          severity: 'MEDIUM',
          description: 'Encryption policy violation detected',
        });
      }
    }

    return violations;
  }
}

Reference & Integration (Level 4)

API Reference

Core Encryption Operations

• encrypt(data, keyId, algorithm) - Encrypt data with specified algorithm
• decrypt(encryptedData) - Decrypt data with validation
• generate_key(algorithm, metadata) - Generate encryption key
• sign_data(data, privateKeyId) - Create digital signature
• verify_signature(signature, publicKeyId) - Verify digital signature

Context7 Integration

• get_latest_cryptography_docs() - Cryptography via Context7
• analyze_encryption_patterns() - Encryption patterns via Context7
• optimize_key_management() - Key management via Context7

Best Practices (November 2025)

DO

• Use industry-standard cryptographic algorithms (AES-256, RSA-4096)
• Implement comprehensive key management with rotation
• Use authenticated encryption (AES-GCM) for data protection
• Implement proper error handling and secure disposal
• Use hardware security modules for key protection
• Maintain comprehensive audit logging and monitoring
• Follow compliance requirements (GDPR, PCI DSS, HIPAA)
• Implement quantum-resistant encryption preparation

DON'T

• Implement custom cryptographic algorithms
• Store encryption keys with encrypted data
• Use deprecated or weak cryptographic algorithms
• Skip key rotation and lifecycle management
• Ignore compliance and regulatory requirements
• Forget to implement proper error handling
• Skip security testing and vulnerability assessments
• Use hardcoded keys or initialization vectors

Works Well With

• moai-security-api (API security implementation)
• moai-foundation-trust (Trust and compliance)
• moai-cc-configuration (Configuration security)
• moai-security-secrets (Secrets management)
• moai-baas-foundation (BaaS security patterns)
• moai-domain-backend (Backend security)
• moai-security-owasp (Security best practices)
• moai-security-compliance (Compliance management)

Changelog

• v4.0.0 (2025-11-13): Complete Enterprise v4.0 rewrite with 40% content reduction, 4-layer Progressive Disclosure structure, Context7 integration, advanced cryptographic patterns, and enterprise key management
• v2.0.0 (2025-11-11): Complete metadata structure, encryption patterns, key management
• v1.0.0 (2025-11-11): Initial encryption security foundation

End of Skill | Updated 2025-11-13

Cryptographic Security

Algorithm Selection

• AES-256-GCM for symmetric encryption with authentication
• RSA-4096 for asymmetric encryption and digital signatures
• ECC P-384 for efficient key exchange
• SHA-384 for cryptographic hashing
• PBKDF2 with 100,000 iterations for key derivation

Enterprise Features

• Hardware Security Module (HSM) integration
• Automated key rotation and lifecycle management
• Comprehensive audit logging and compliance reporting
• Quantum-resistant encryption preparation
• Zero-knowledge proof implementation support

End of Enterprise Encryption Security Expert v4.0.0