ISO 26430-6:2009描述了观众席安全信息（ASM）规范，该规范允许通过剧院内展览网络在设备之间进行安全关键信息（确保D影院内容安全所需的信息）的互操作通信。该规范使用传输层安全性（TLS）进行身份验证和保密，使用密钥长度值（KLV）编码进行消息编码。它为链路加密密钥定义了一个协议、一个通用请求-响应消息集和一个特定的消息集。

ISO 26430-6:2009 describes the Auditorium Security Message (ASM) specification, which enables interoperable communication of security-critical information (information necessary to ensure security of D-Cinema content) between devices over an intra-theater exhibition network. The specification uses Transport Layer Security (TLS) for authentication and confidentiality, and Key Length Value (KLV) coding for message encoding. It defines a protocol, a general purpose request-response message set and a specific message set for link encryption keying.