Adobe Document Encryption Guidelines and Compatibility Matrix
Product Version | Acrobat X (AES-256) Compatible (Recommended Choice) | Acrobat 9.0 and Later (AES-128, AES-256) Compatible | Acrobat 7.0 and Later (128-bit RC4, AES-128) Compatible | Acrobat 6.0 and Later (128-bit RC4) Compatible | Acrobat 5.0 and Later (128-bit RC4) | Acrobat 3.0 and Later (40-bit) |
|---|---|---|---|---|---|---|
Acrobat X | 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 |
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