There are software's tools to crack PDF passwords and unlock PDF restrictions, now there is a dedicated hardware and software combination to tackle the issue. Named "BeagleBone" the specialized "PDF password cracker" is a dedicated solution consisting of embedded Linux and a 700 MHz ARM processor, you simply need to insert a thumb-drive having the encoded/locked/password-protected PDF files and click a button to start the cracking process. In it's current form the "BeagleBone" uses a single ARM processor to brute-force crack the password by trying 6000 four-character passwords per second, but the interesting part is - multiple parallel ARM processors can be used to achieve faster decryption.

PDF authors often restrict their files using PDF security features preventing users from copying, editing or printing the contents, and like every other protection this can also be easily bypassed, there exist several methods to crack or unlock PDF files, but if you are looking for a simple and fast way to just bypass the copying & printing restrictions of the PDF file Ensode online PDF Unlock Utility will be the best option, You just need to upload the file and the unlocked version of the PDF without printing or copying/pasting restrictions will be displayed in a new browser window in your default PDF application, Similarly you can use "Ensode Free Excel Spreadsheet Unlock Online Utility" to unlock Microsoft Excel spreadsheet passwords.