Adobe 22020737 Acrobat X Pro Manual - Page 231

USING ACROBAT X PRO 225 Security Password strength indicator 6 To allow recipients to copy PDF content to another document, select Enable Copying Of Text, Images, And Other Content. 7 Click OK. At the prompt to confirm each password, retype the appropriate password in the box and click OK. Security options You can set the following options when you create a PDF or when you apply password protection to a PDF. Options vary depending on the Compatibility setting. Security options are not available for PDF/X standards or presets. The names of the settings may vary in different applications. Compatibility Sets the type of encryption for opening a password-protected document. If you choose Acrobat 3.0 And Later (PDF 1.3) option, a low-encryption-level security (40-bit RC4) is used. If you choose Acrobat 5.0 And Later (PDF 1.4) or Acrobat 6.0 And Later (PDF 1.5), a high encryption level (128-bit RC4) is used. Choosing Acrobat 7.0 And Later (PDF 1.6) encrypts the document using the AES encryption algorithm with a 128-bit key size. Acrobat X And Later (PDF 1.7) encrypts the document using 256-bit AES. Note: Select Acrobat X And Later to apply 256-bit AES encryption to Acrobat 8 and 9 documents. Be aware that anyone using an earlier version of Acrobat cannot open a PDF document with a higher compatibility setting. For example, if you select the Acrobat X and later option, the document cannot be opened in Acrobat 7 or earlier. Encrypt All Document Contents (Acrobat) Select this option to encrypt the document and the document metadata. If this option is selected, search engines cannot access the document metadata. Encrypt All Document Contents Except Metadata (Acrobat) Select this option to encrypt the contents of a document but still allow search engines access to the document metadata. Encrypt Only File Attachments (Acrobat) Select this option to require a password for opening file attachments. However, users can open the document without a password. Require A Password To Open The Document Select this option to require users to type the password you specify to open the document. This option is unavailable if Encrypt Only File Attachments is selected. Document Open Password Specify the password that users must type to open the PDF file. Note: If you forget a password, there is no way to recover it from the document. It's a good idea to store passwords in a separate secure location in case you forget them. Last updated 10/11/2011