ISO/IEC 23001-7:2023 信息技术 MPEG系统技术 第7部分：ISO基础媒体文件格式文件中的常用加密

标准编号：ISO/IEC 23001-7:2023

中文名称：信息技术 MPEG系统技术 第7部分：ISO基础媒体文件格式文件中的常用加密

英文名称：Information technology — MPEG systems technologies — Part 7: Common encryption in ISO base media file format files

发布日期：2023-08

标准范围

ISO/IEC 23001-7:20 23本文档规定了用于基于ISO/IEC 14496-12的任何文件格式的通用加密格式。指定文件、项目、轨道和轨道片段元数据以使多个数字权限和密钥管理系统(DRMs)能够访问相同的公共加密文件或流。本文档没有定义DRM系统。AES-128对称分组密码用于加密媒体样本中包含的基本流数据。AES计数器模式（CTR）和密码块链接（CBC）都在单独的保护方案中指定。使用加密和清除块的模式的部分加密也在单独的保护方案中指定。为每个方案指定了加密密钥的识别、初始化向量的存储和处理。为诸如AVC和HEVC的NAL结构化视频指定子样本加密，以在解密之前实现视频基本流的正常处理和编辑。为重要的公共加密信息指定XML表示，以便可以将其作为标准元素和属性包括在XML文件中，以在媒体文件下载之前实现可互操作的许可证和密钥管理。

ISO/IEC 23001-7:2023 This document specifies common encryption formats for use in any file format based on ISO/IEC 14496-12. File, item, track, and track fragment metadata is specified to enable multiple digital rights and key management systems (DRMs) to access the same common encrypted file or stream. This document does not define a DRM system.
The AES-128 symmetric block cipher is used to encrypt elementary stream data contained in media samples. Both AES counter mode (CTR) and Cipher Block Chaining (CBC) are specified in separate protection schemes. Partial encryption using a pattern of encrypted and clear blocks is also specified in separate protection schemes. The identification of encryption keys, initialization vector storage and processing is specified for each scheme.
Subsample encryption is specified for NAL structured video, such as AVC and HEVC, to enable normal processing and editing of video elementary streams prior to decryption.
An XML representation is specified for important common encryption information so that it can be included in XML files as standard elements and attributes to enable interoperable license and key management prior to media file download.

标准预览图