Adobe PDF passwords

Supported Adobe PDF formats and password types

Version Permissions password
(Master password)
Document open password
(User password)
Adobe PDF Acrobat 2-4 (RC4 40-bit) •* C
Acrobat 5-8 (RC4 128-bit, AES-128) •* G
Acrobat 9-XI (AES-256) •* C

•* – instant recovery of the original password starting at the launch of the program.

C – password recovery process involves the computer's CPU. In order to maximize the process of password recovery the program uses codes specifically optimized for the specific CPU.

G – password recovery process involves all video cards installed on the computer.

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