Encryption class

Enhanced encryption utilities for database security

This class provides various encryption and hashing methods for securing sensitive data in the database.

Example usage:

final encryption = Encryption();

// Hash a password
final hashedPassword = encryption.hashPassword('myPassword123');

// Encrypt sensitive data
final encrypted = encryption.encrypt('sensitive data', 'secretKey');
final decrypted = encryption.decrypt(encrypted, 'secretKey');

// Generate secure tokens
final token = encryption.generateToken();