ISO/IEC 23001-7:2012
Information technology — MPEG systems technologies — Part 7: Common encryption in ISO base media file format files
ISO/IEC 23001-7:2012 specifies a common encryption format for use in any file format based on ISO/IEC 14496-12, the ISO base media file format.
The 'cenc' Common Encryption Scheme specifies standard encryption and key mapping methods that can be utilized by one or more digital rights and key management systems (DRM systems) to enable decryption of the same file using different DRM systems. The scheme operates by defining a common format for the encryption related metadata necessary to decrypt the protected streams, yet leaves the details of rights mappings, key acquisition and storage, DRM compliance rules, etc. up to the DRM system or systems supporting the 'cenc' scheme.
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1 Scope
2 Normative references
3 Definitions
3.1 Terms and definitions
3.2 Abbreviated terms
4 Scheme Signalling
5 Overview of Encryption Metadata
6 Encryption Parameters shared by groups of samples
7 Common Encryption Sample Auxiliary Information
8 Box Definitions
8.1 Protection System Specific Header Box
8.1.1 Definition
8.1.2 Syntax
8.1.3 Semantics
8.2 Track Encryption Box
8.2.1 Definition
8.2.2 Syntax
8.2.3 Semantics
9 Encryption of Media Data
9.1 Encryption Schemes
9.2 Field semantics
9.3 Initialization Vectors
9.4 Counter Operation
9.5 Full Sample Encryption
9.6 Subsample Encryption
9.6.1 Definition
9.6.2 Encryption of AVC tracks
9.6.2.1 Structure of AVC video tracks
9.6.2.2 Subsample Encryption Applied to AVC
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1 Scope
2 Normative references
3 Definitions
3.1 Terms and definitions
3.2 Abbreviated terms
4 Scheme Signalling
5 Overview of Encryption Metadata
6 Encryption Parameters shared by groups of samples
7 Common Encryption Sample Auxiliary Information
8 Box Definitions
8.1 Protection System Specific Header Box
8.1.1 Definition
8.1.2 Syntax
8.1.3 Semantics
8.2 Track Encryption Box
8.2.1 Definition
8.2.2 Syntax
8.2.3 Semantics
9 Encryption of Media Data
9.1 Encryption Schemes
9.2 Field semantics
9.3 Initialization Vectors
9.4 Counter Operation
9.5 Full Sample Encryption
9.6 Subsample Encryption
9.6.1 Definition
9.6.2 Encryption of AVC tracks
9.6.2.1 Structure of AVC video tracks
9.6.2.2 Subsample Encryption Applied to AVC