本文件规定了可调整的分组密码。可调整分组密码是一系列由密钥值和公共调整值参数化的位置换。这些原语是通用工具，可以用作构造加密方案的构建块，例如加密、消息身份验证代码、经过身份验证的加密等。 总共定义了五种不同的可调整分组密码。它们在表中分类1.

This document specifies tweakable block ciphers. A tweakable block cipher is a family of n-bit permutations parametrized by a secret key value and a public tweak value. Such primitives are generic tools that can be used as building blocks to construct cryptographic schemes such as encryption, Message Authentication Codes, authenticated encryption, etc. A total of five different tweakable block ciphers are defined. They are categorized in Table？1.