This software tool can recover PDF passwords for 128 and 256-bit encryption, using advanced technologies such as GPU and multi-core support. It offers a special password definition language and delivers high recovery rates on modern processors, making it an efficient solution for password retrieval.

One of the best things about Parallel PDF Password Recovery is its flexibility. The local SMP version can support up to 8 CPU processors/cores and up to 8 NVIDIA GPU cards on your home PC. Meanwhile, the distributed version allows you to vectorize the recovery process on clients (workstations) on your LAN or internet.
The software's simple and powerful Password Definition Language supports all well-known standard attacks (such as brute force, dictionary, and misspelled password recovery) and allows users to make their own attack types. This makes it incredibly efficient, especially if you remember any information about a forgotten password (such as the password consisting of two words separated by a special sign).
The utility is highly optimized for modern processors, such as Core 2 or Athlon and for NVIDIA GPUs. Plus, it's compatible with all PDF versions, including the latest Acrobat 9 files.
Overall, if you need a reliable and flexible PDF password recovery tool, Parallel PDF Password Recovery is definitely worth checking out.
Version 1.6: NVIDIA Fermi support
Version 1.5: N/A
Version 1.0: N/A