DRM

DRM¶

Content Scramble System (CSS)¶

• Used for DVD DRM
• Uses M6 block cipher
  • Only 40-bits encryption key
    • Could brute force in 18 seconds with 450MHz Pentium III
• Multi Keys
  • Authentication Key
  • Title Keys
  • Disk Keys
  • Player Keys
  • Disk Key Block

Advanced Access Content System (AACSv1)¶

• DRM HD-DVD and blue-ray
• Uses AES128 and SHA1
  • Uses AES-G3 as a hash function?
• Used software that could read disks and dumped memory for keys
  • Also the PS3 vulns helped leaking keys

Advanced Access Content System (AACSv2)¶

• Used in 4K Bluray releases
• Only works with Intel and Windows with SGX
  • Finally broken with Shim and full attestation reimplemented in python

SecuROM 7¶

Breaking SecuROM 7