Adobe 22002484 Security Guide - Page 84

Add Digital ID, Enable copying of text, images, and other content

Page 84 highlights

Acrobat Family of Products Security Feature User Guide Certificate Security Creating Certificate Security for the Current Document 84 3. Enable copying of text, images, and other content: Allows file contents (excluding comments) to be copied. It also makes the content available to assistive technology devices such as screen readers. It also lets utilities that need access to the contents of a PDF file, such as Acrobat Catalog, get to those contents. This option is only available if a high encryption level is selected. 4. Enable text access for screen reader devices for the visually impaired: Only available if the option above is NOT checked. Lets visually impaired users read the document with screen readers. This option doesn't allow users to copy or extract the document's contents. This option is only available if a high encryption level is selected. 5. Choose the encryption algorithm:  128-bit RC4: Compatible with Acrobat 6.0 and later as well as other non-Adobe and Adobe PDF clients such as Ghostscript and Apple Preview that have not implemented AES. RC4 has a smaller file size by about 32 bytes per stream.  128-bit AES: Compatible with Acrobat 7.0 and later. It is mandated for some U.S. government documents because it is more secure than RC4. AES has a bigger file size and adds up to 32 bytes per stream.  256-bit AES: Compatible with Acrobat 9.0 and later. Provides the highest level of encryption. Note: The RC4 encryption algorithm is unavailable if your administrator has configured your application to operate in FIPS mode. 6. Choose Next. 7. The Digital ID Selection dialog may not appear. If it does not appear, go to the "add document recipients to the recipient list" step: The digital ID selection dialog only appears if you have no digital IDs suitable for encryption or more than one. If you only have one digital ID suitable for encryption, then this dialog does not appear (for example, one ID is set as the default for encryption in the Security Settings Console). If the dialog does appear, select your digital ID that you will use to access this document in the future. Tip: While it is possible to apply certificate security without selecting your digital ID, doing so leaves you off of the recipient list and permanently locks you out of the document. If the required digital ID does not appear in the list, choose Add Digital ID and follow the steps described in "Registering a Digital ID for Use in Acrobat" on page 12.

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Acrobat Family of Products
Certificate Security
Security Feature User Guide
Creating Certificate Security for the Current Document
84
3.
Enable copying of text, images, and other content
: Allows file contents (excluding comments) to
be copied. It also makes the content available to assistive technology devices such as screen
readers. It also lets utilities that need access to the contents of a PDF file, such as Acrobat Catalog,
get to those contents. This option is only available if a high encryption level is selected.
4.
Enable text access for screen reader devices for the visually impaired
: Only available if the
option above is NOT checked. Lets visually impaired users read the document with screen readers.
This option doesn't allow users to copy or extract the document's contents. This option is only
available if a high encryption level is selected.
5.
Choose the encryption algorithm:
128-bit RC4
: Compatible with Acrobat 6.0 and later as well as other non-Adobe and Adobe PDF
clients such as Ghostscript and Apple Preview that have not implemented AES. RC4 has a smaller file
size by about 32 bytes per stream.
128-bit AES:
Compatible with Acrobat 7.0 and later. It is mandated for some U.S. government
documents because it is more secure than RC4. AES has a bigger file size and adds up to 32 bytes
per stream.
256-bit AES
: Compatible with Acrobat 9.0 and later. Provides the highest level of encryption.
Note:
The RC4 encryption algorithm is unavailable if your administrator has configured your
application to operate in FIPS mode.
6.
Choose
Next
.
7.
The Digital ID Selection dialog may not appear. If it does not appear, go to the “add document recipients to
the recipient list” step
: The digital ID selection dialog only appears if you have no digital IDs suitable for
encryption or more than one. If you only have one digital ID suitable for encryption, then this dialog
does not appear (for example, one ID is set as the default for encryption in the Security Settings
Console). If the dialog does appear, select your digital ID that you will use to access this document in
the future.
Tip:
While it is possible to apply certificate security without selecting your digital ID, doing so
leaves you off of the recipient list and permanently locks you out of the document.
If the required digital ID does not appear in the list, choose
Add Digital ID
and follow the steps
described in
“Registering a Digital ID for Use in Acrobat” on page 12
.