| 00 |
None |
Has no technical protection |
| 01 |
DRM |
Has DRM protection |
| 02 |
Digital watermarking |
Has digital watermarking |
| 03 |
Adobe DRM |
Has DRM protection applied by the Adobe CS4 Content Server Package or by the Adobe ADEPT hosted service |
| 04 |
Apple DRM |
Has FairPlay DRM protection applied via Apple proprietary online store |
| 05 |
OMA DRM |
Has OMA v2 DRM protection applied, as used to protect some mobile phone content |
| 06 |
Readium LCP DRM |
Has Licensed Content Protection DRM applied by a Readium License Server |
| 07 |
Sony DRM |
Has Sony DADC User Rights Management (URMS) DRM protection applied |