Acrobat 9 Family of Products
External Content and Document Security
Security Feature User Guide
Controlling Multimedia in Certified Documents 138
1. Check or uncheck
Allow multimedia operations
.
2. Set multimedia player permissions as follows: Select the player in the list and select an option from
the
Change permission for selected multimedia player to
drop-down list:
Always
: The player is used without prompting.
Never
: Prevents the player from being used.
Prompt
: Prompts the user to enable the player when a media clip tries to use that player.
3. Select one or more of the playback options:
Allow playback in floating window with no title bars
: Opens the media in a separate window
without a title bar.
Allow document to set title text in a floating-playback window
: Opens the media in a
separate window with a title bar.
Allow playback in full-screen window
: Opens the media in full-screen mode.
Note:
Membership on the trusted document list is permanent until the list is manually cleared. Choose
Clear
to remove all documents from that list.
4. Choose
OK
.
9.2.2 Controlling Multimedia in Certified Documents
Note:
Multimedia and other dynamic content poses a security risk because it could potentially change
the document’s appearance or allow security holes in multimedia players to adversely impact
your system. Participants in certification workflows should consider the source of the document
and the security of the workflow before enabling dynamic content.
Whether dynamic content executes in certified documents based on the Trusted Document or Other
Document settings depends on two items under your control:
You can configure a certified document to use the trusted document settings on a per-certificate basis
or by using trust anchors. If a signer’s certificate chains up to another certificate (a trust anchor) that
allows multimedia, then multimedia will run in that certified document. For example, some enterprises
may issue a MyCompany certificate that allows dynamic content. If all employee certificates use
MyCompany as a trust anchor, then they can send and receive certified documents within the company
that could contain working multimedia.
If the certificate trust settings allow dynamic content, the Multimedia Trust Manager’s
Trusted
documents
settings are used.
If the certificate trust settings do not allow dynamic content, the Trust Manager’s
Other
Documents
settings are used, UNLESS the document has already been added to the trusted
documents list.
You can configure a certified document to always use the trusted document settings regardless of
certificate trust levels by adding it to the Trusted Documents list.
Preventing Multimedia Playback in Certified Documents
To prevent dynamic content from playing in any certified document do one of the following:
Never allow multimedia: Uncheck
Allow multimedia operations
in the Trust Options panel for both
trusted and untrusted documents as described in
“Configuring Multimedia Trust Preferences” on page
137
.