本文件定义了基于弱机密的密钥建立机制，即可以 很容易被人记住，因此，秘密将从一个相对较小的集合中选择 可能性。它指定了专门设计用于建立一个或多个秘密的加密技术 基于从记忆密码中提取的弱秘密的密钥，同时防止离线暴力 与弱秘密有关的攻击。包含以下内容:BS ISO/IEC 11770-4:2017+A1:2019

This document defines key establishment mechanisms based on weak secrets, i.e. secrets that can be readily memorized by a human, and hence, secrets that will be chosen from a relatively small set of possibilities. It specifies cryptographic techniques specifically designed to establish one or more secret keys based on a weak secret derived from a memorized password, while preventing offline brute-force attacks associated with the weak secret.Incorporates the following:BS ISO/IEC 11770-4:2017+A1:2019