/**
 * Encrypt a string using a password. Returns a base64 payload containing
 * salt + iv + authTag + ciphertext.
 */
declare function encryptString(plain: string, password: string): string;
/**
 * Decrypt a base64 payload produced by `encryptString` using the same password.
 */
declare function decryptString(payload: string, password: string): string;

export { decryptString, encryptString };