PDF Password Remover 

The PDF Password Remover can be used to decrypt protected Adobe Acrobat PDF files, which have "owner" password set.
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Encrypt & Decrypt PDF 

Encrypt & Decrypt PDF allows you to Encrypt and Decrypt protected Adobe Acrobat PDF files in batch mode. With this software, you may freely secure your PDF files from being printed, changed, copied, extracted, signed of your PDF files.
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