MPEG Common Encryption (abbreviated MPEG-CENC) refers to a set of two

MPEG The Moving Picture Experts Group (MPEG) is an alliance of working groups established jointly by International Organization for Standardization, ISO and International Electrotechnical Commission, IEC that sets standards for media coding, includ ...

standards governing different container formats: * for

ISOBMFF The ISO base media file format (ISOBMFF) is a container file format that defines a general structure for files that contain time-based multimedia data such as video and audio. It is standardized in ISO/IEC 14496-12, a.k.a. MPEG-4 Part 12, and wa ...

, ''Common encryption in ISO base media file format files'' (ISO/IEC 23001-7:2016) * for MPEG-TS, ''Common encryption of MPEG-2 transport streams'' (ISO/IEC 23001-9:2016) The specifications are compatible, so that conversion between the encrypted formats can happen without re-encryption. They define metadata, specific to each format, about which parts of the stream are encrypted and by which encryption scheme. Each encryption scheme may have different methods to retrieve the decryption key.

Availability of the Standards

The standards can be purchased from iso.org, on paper and in digital forms. As of July 2016, the prices were 118

Swiss franc The Swiss franc, or simply the franc, is the currency and legal tender of Switzerland and Liechtenstein. It is also legal tender in the Italian exclave of Campione d'Italia which is surrounded by Swiss territory. The Swiss National Bank (SNB) iss ...

(US$122) for the ISOBMFF version, and 58 Swiss franc (US$60) for the TS version. An included copyright notice prohibits redistribution without written permission, also on

local area network A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, campus, or building, and has its network equipment and interconnects locally managed. LANs facilitate the distribution of da ...

s. Each page is watermarked with the purchaser's name and company.

References

External links

"cenc" Initialization Data Format
– a rough description, specific to ISOBMFF, of the ''Clear Key'' encryption scheme, intended for use in

Encrypted Media Extensions Encrypted Media Extensions (EME) is a W3C specification for providing a communication channel between web browsers and the Content Decryption Module (CDM) software which implements digital rights management (DRM). This allows the use of HTML vide ...

MPEG Digital rights management standards {{computing-stub