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Lee Holmes :donor: (lee_holmes@infosec.exchange)'s status on Wednesday, 26-Feb-2025 10:37:47 JST Lee Holmes :donor:

TIL how crazy the "BD+" BluRay copy protection mechanism is. BluRay discs ship actual executable programs written for a custom virtual machine that can execute arbitrary code??!!
Also LOL:
"The copy protection scheme was to take "10 years" to crack, according to Richard Doherty, an analyst with Envisioneering Group".
Oct 2007: The first discs with BD+ encryption are released
March 2008: AnyDVD HD released, allowing the full decryption of BD+, allowing not only the viewing of the film itself but also playing and copying disks with third-party software.
https://en.wikipedia.org/wiki/BD%2B
In conversation about 3 months ago from infosec.exchange permalink
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1. Capabilities [edi] BD+ is effectively a virtual machine embedded in authorized players. It allows content providers to include executable programs on Blu-ray Discs. Such programs can:l’] « examine the host environment, to see if the player has been tampered with. Every licensed playback device manufacturer must provide the BD+ licensing authority with memory footprints that identify their devices. « verify that the player's keys have not been changed. « execute native code, possibly to patch an otherwise insecure system. « transform the audio and video output. Parts of the content will not be viewable without letting the BD+-program repair it.
  https://media.infosec.exchange/infosec.exchange/media_attachments/files/114/067/560/467/190/833/original/01a36623c08d0a3e.png

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