本文件规定了广播认证协议，这些协议在广播设置中提供数据完整性和实体认证，即一个发送方向多个接收方发送消息的设置。为了提供实体身份验证，需要有一个预先存在的基础设施，将发送方链接到加密密钥。这种基础设施的建立超出了本文件的范围。

This document specifies broadcast authentication protocols, which are protocols that provide data integrity and entity authentication in a broadcast setting, i.e. a setting with one sender transmitting messages to many receivers. To provide entity authentication, there needs to be a pre-existing infrastructure which links the sender to a cryptographic secret. The establishment of such an infrastructure is beyond the scope of this document.