/// <reference types="node" />
export declare const defaultAlgorithm = "aes192";
/**
 *
 * @param buf
 * @param secret
 * @returns
 */
export declare function aesEncryptDeprecated(buf: Buffer, secret: string): Buffer;
/**
 *
 * @param buf
 * @param secret
 * @returns
 */
export declare function aesDecryptDeprecated(buf: Buffer, secret: string): Buffer;
export declare const TOKEN_VALID_LENGTH_DEPRECATED = 64;
/**
 * Generate a secret key of 64 characters.
 */
export declare function generateRandomSecretKeyDeprecated(): string;