MPEG Common Encryption

MPEG Common Encryption refers to a set of two MPEG standards governing different container formats:

for ISO [base media file format|ISOBMFF], Common encryption in ISO base media file format files
for MPEG [transport stream|MPEG-TS], Common encryption of MPEG-2 transport streams

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 for the ISOBMFF version, and 58 Swiss franc for the TS version. An included copyright notice prohibits redistribution without written permission, also on local area networks. Each page is watermarked with the purchaser's name and company.