此工作项定义了一组协议和相关的配置文件，用于互联网电话设备可能使用的安全机制。这些安全机制可以提供授权、保密性、访问控制、不可否认性和数据完整性。该工作项提供了足够的细节，以便符合这些规范的互联网电话设备能够相互互操作。本工作项定义了服务级别的安全性，旨在使网络运营商能够明确定义至少最低级别的互联网电话服务的安全性，包括公钥和密钥技术。

This work item defines a set of protocols and associated profiles for security mechanisms that nay be used by Internet telephony equipment. Those security mechanisms may provide authorisation, confidentiality, access control, non-repudiation, and data integrity. The work item provides sufficient detail so that Internet telephony devices that conform to these specifications will be mutually interoperable. This work item defines security at a service level, and it is intended that network operators will be able to unambiguously define the security of Internet telephony services at least at the lowest level, including both, public key and secret key technologies.