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MPEG Common Encryption
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<p>MPEG Common Encryption (abbreviated MPEG-CENC) refers to a set of two <a href="/facts/Moving_Picture_Experts_Group/ygmT7JBB">MPEG</a> standards governing different <a href="/facts/Digital_container_format/mSfwwdSA">container formats</a>: </p> <ul><li>for <a href="/facts/ISO_base_media_file_format/whvAPejY">ISOBMFF</a>, <i>Common encryption in ISO base media file format files</i> (ISO/IEC 23001-7:2016)</li> <li>for <a href="/facts/MPEG_transport_stream/2wBLnyeD">MPEG-TS</a>, <i>Common encryption of MPEG-2 transport streams</i> (ISO/IEC 23001-9:2016)</li></ul> <p>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. </p>