PDF Password by Thegrideon Software - Version 2013.01.30 PDF Password by Thegrideon Software is advanced password recovery, decryption and restrictions (e.g. no copying, no printing, no editing, etc.) removal tool for .pdf documents.All standard .pdf encryption methods are supported upto the latest from Acrobat XI.PDF files without or with known (user) password to open can be instantly saved with restrictions cleared.PDF files with 40bit encryption can be decrypted with guarantee.The set of configurable methods are available for password recovery of pdf files with (user) password to open and 128 - 256bit RC4 or AES encryption. Supports up to 64 simultaneous processing threads (multi-CPU, multi-core and HT).Highly optimized code (SSE, AVX, AES-NI) guarantees maximum performance.Utilizes NVIDIA and AMD GPUs with a high-performance methods.