Supported Formats and Password Types
| Versions | Adobe PDF | ||||||||||||
| Acrobat 2-4 (RC4 40-bit) | Acrobat 5-8 (RC4 128-bit, AES-128) | Acrobat 9-DC (AES-256) | |||||||||||
| Document open password | C | C | C | ||||||||||
| Permissions password | •* | •* | •* | ||||||||||
| PDF decryption | C | – | – | ||||||||||
| •* – instant recovery; C – CPU recovery; – — not supported; | |||||||||||||
•* – instant recovery of the original password starting at the launch of the program.
•** – instant removes protection through elimination of the password.
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.