本标准介绍了数字证书的规范。该标准充分详细地定义了数字证书格式和相关处理规则，使供应商能够开发和实施可互操作的安全解决方案。数字证书标准基于X.509v3[X.509]格式和处理规则的约束形式。仅使用X.509v3最广泛支持的功能，以便为供应商提供大量X.509v3开发工具包和证书颁发产品。这些约束还避免了在使用X的系统中经常出现的复杂性和模糊性。 509v3证书。在D-Cinema环境中，证书具有以下主要应用:建立安全设备的身份支持网络层（如TLS）或应用程序消息层（如额外影院消息[ETM]）的安全通信合成播放列表（CPL）和装箱列表（PL）的认证和完整性要求

This standard presents a specification for Digital Certificates. The standard defines the Digital Certificate format and associated processing rules in sufficient detail to enable vendors to develop and implement interoperable security solutions.The Digital Certificate standard is based on a constrained form of the X.509v3 [X.509] format and processing rules. Only the most widely supported features of X.509v3 are used in order to give vendors a large selection of X.509v3 development toolkits and certificate issuing products. The constraints also avoid the complexity and ambiguity that often occurs in systems that use X.509v3 certificates.In the D-Cinema environment, certificates have these primary applications:Establishing identity of security devicesSupporting secure communications at the network layer (e.g. TLS) or application-messaging layer (e.g., Extra Theater Messages [ETM])Authentication and integrity requirements for Composition Play Lists (CPL) and Packing Lists (PL)