Starting from version 1.5.8 MakeMKV downloads all required SVQ files automatically - all discs that require disc-specific SVQ should work without any additional steps. Sending us a dump file will help to analyze new versions of BD+ protection and expand the generic svq support. We will produce and make available for download disc-specific SVQ files from all dump files sent to. If no disc-specific SVQ is available or BD+ version is too new for a generic svq, and "BD+ dump directory" is set in preferences then program will create a "BD+ dump file". Since MakeMKV doesn't contain any BD+ keys it requires either generic or disc-specific SVQ file to process BD+ protected disc. In that regard disc-specific SVQ files are very similar to AACS volume keys. They share the same fate as AACS processing keys though - once published the keys contained in generic SVQ would be revoked and will stop working with newer discs.ĭisc-specific SVQ only allow processing of a single specific disc, but they last forever and provide no revocation information. Generic SVQs allow processing of all BD+ discs that were released before specific date - they are similar to what is an AACS processing key. SVQ files come in two flavors - generic SVQs and disc-specific SVQs. SVQ file is a small (typically less than 64 bytes) file that contains keys necessary to execute BD+ program. MakeMKV contains an implementation of BD+ virtual machine that is required to execute BD+ code and can process any BD+ enabled disc, however there is a big catch - MakeMKV doesn't contain BD+ decryption keys. Two things are required in order to execute BD+ program - execution environment (BD+ virtual machine ) and a set of decryption keys. BD+ program code must be executed in order to access protected AV clips in addition to being encrypted AV clips are also "damaged" and BD+ code execution is required to "fix" the files. Every blu-ray player knows how to execute such program and program code has complete access to all player hardware. In addition to standard AACS encryption each disc with BD+ protection contains a program that is executed by a player each time disc is loaded. ![]() ![]() An overview of BD+ (albeit somewhat incorrect) can be found at wikipedia. BD+ is a sophisticated protection scheme used by some blu-ray discs.
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