Advanced PDF Password Recovery unlocks PDF documents and removes editing, printing and copying restrictions instantly. Get access to encrypted and password-protected PDF documents quickly and efficiently. The multi-threaded low-level code is optimized for modern multi-core PCs, ensuring the best performance. The program instantly removes all restrictions and unlocks the protected PDF file; if you cannot open a PDF file without knowing the password, you need the Professional edition, that also allows retrieving the "owner" and "user" passwords with brute-force and dictionary attacks. The unique Key Search Attack guarantees the recovery of PDF documents protected with 40-bit encryption in a matter of days. Removing JScript code, form fields and digital signatures is also an option. And the Enterprise edition adds the unique, patent-pending Thunder Tables technology that allows recovering "user" passwords in a minute's timeframe instead of days.