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Reference: http://www.adobe.com/devnet-docs/acrobatetk/tools/QuickKeys/Acrobat_DocumentSecurityAlgoAll.pdf
Product Version | Acrobat X (AES-256) Compatible Format (Recommended Choice) | Acrobat 9.0 and Later (AES-128, AES-256) Compatible Format* | Acrobat 7.0 and Later (128-bit RC4, AES-128) Compatible Format (Recommended Minimum) Compatible | Acrobat 6.0 and Later (128-bit RC4) Compatible Compatible Format | Acrobat 5.0 and Later (128-bit RC4) Compatible Format | Acrobat 3.0 and Later (40-bit) Compatible Format |
|---|---|---|---|---|---|---|
Acrobat X or higher (Recommended Version)* | Yes | Yes | Yes | Yes | Yes | Yes |
Acrobat 9.0 | No | Yes | Yes | Yes | Yes | Yes |
Acrobat 8.0 | No | No | Yes | Yes | Yes | Yes |
Acrobat 7.0 | No | No | Yes | Yes | Yes | Yes |
Acrobat 6.0 | No | No | No | Yes | Yes | Yes |
Acrobat 5.0 | No | No | No | No | Yes | Yes |
Acrobat 4.0 | No | No | No | No | No | Yes |
Acrobat 3.0 | No | No | No | No | No | Yes |
*Note: in Acrobat X there is no longer an "Acrobat 9 and later" option on the list because the 256-bit AES algorithm implementation used in Acrobat 9 was flawed.
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Product Version | Office 2010/2013 Compatible Format (The default encryption algorithm is AES 128-bit. AES 192-bit and AES 256-bit are supported.) (Recommended Choice) | Office 2007 Compatible Format (The default encryption algorithm is AES 128-bit. AES 192-bit and AES 256-bit are supported) (Recommended Minimum) | Office 2003 Compatible Compatible Format (128-bit RC4 Encryption) | Office XP Compatible Compatible Format (40-bit RC4 Encryption) | Office 2000 Compatible Compatible Format (40-bit RC4 Encryption) | Office 97 Compatible Compatible Format (40-bit RC4 Encryption) |
|---|---|---|---|---|---|---|
Office for Mac 2011 (Recommended Version) | Yes | Yes | Yes | Yes | Yes | Yes |
Office 2010/2013 (Recommended Version) | Yes | Yes | Yes | Yes | Yes | Yes |
Office for Mac 2008 | No | Yes | Yes | Yes | Yes | Yes |
Office 2007 SP2 | Yes | Yes | Yes | Yes | Yes | Yes |
Office 2003 with Office 2007 SP2 Compatibility Pack | Yes | Yes | Yes | Yes | Yes | Yes |
Office 2003 | No | No | Yes | Yes | Yes | Yes |
Office XP | No | No | No | Yes | Yes | Yes |
Office 2000 | No | No | No | No | Yes | Yes |
Office 97 | No | No | No | No | No | Yes |
*Note: Encryption functionality is available on Word, Excel, PowerPoint, and Access. However, not all Office suite products have encryption functionality (e.g. Outlook, Publisher, etc.).
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