import CryptoJS from 'crypto-js';
/**
 * Generate a random key of specified length
 */
export declare function generateRandomKey(length?: number): string;
/**
 * Generate a random salt
 */
export declare function generateSalt(length?: number): string;
/**
 * Generate a random IV (Initialization Vector)
 */
export declare function generateIV(length?: number): string;
/**
 * Derive a key from a password using PBKDF2
 */
export declare function deriveKeyFromPassword(password: string, salt: string, iterations?: number, keySize?: number): CryptoJS.lib.WordArray;
/**
 * Hash a string using SHA256
 */
export declare function hashString(input: string): string;
/**
 * Generate HMAC signature
 */
export declare function generateHMAC(message: string, key: string): string;
/**
 * Verify HMAC signature
 */
export declare function verifyHMAC(message: string, key: string, signature: string): boolean;