[Bug 21104] Distinguish between CDMs that allow the users to have digital access to the decrypted or decoded data versus those that do not.

https://www.w3.org/Bugs/Public/show_bug.cgi?id=21104

--- Comment #4 from Fred Andrews <fredandw@live.com> ---
(In reply to comment #1)
> Adding definitions that are not referenced serve no purpose. What is the
> technical purpose of making this distinction?

Text that references these definitions needs to be added to the EME
specification, and we need the definitions to be able to discuss
bugs that are working towards text changes.

> In particular, what EME
> defined API or function operates (when viewed from the outside of the CDM
> black box) when using a CDM that is designated as a SCDM or as a DRM-CDM? If
> there is no externally visible technical difference (from the API
> perspective), then there seems to be little utility in making this
> distinction.

The two case are very distinct and the implications are wider
than just the API, but even considering just the API there
are significant differences.  For example, for a SCDM the
web browser will have a 'save as' option to store the
decrypted content, and the user will be able to view
the saved content in future without a license server so much
of the EME infrastructure is not needed and could be
disabled for security and privacy reasons when a SCDM is
used.

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Received on Monday, 25 February 2013 13:03:09 UTC