1)   PDF Password Recovery and PDF Password Remover COM SDK 2.2 The PDF Password Remover COM can be used to decrypt protected Adobe Acrobat PDF files, which have "owner" password set. 2)   Encrypt PDF Command Line 2.3 Encrypt PDF software allows you to encrypt (using standard 40-bit or 128-bit supported by Acrobat Reader 5.0 and up) existing PDFs. 3)   Encrypt PDF (Secure PDF) 2.3 Encrypt PDF software allows you to encrypt (using standard 40-bit or 128-bit supported by Acrobat Reader 5.0 and up) existing PDFs. 4)   Encrypt PDF SDK-COM Component 2.1 Encrypt PDF SDK-COM allows you to encrypt (using standard 40-bit or 128-bit supported by Acrobat Reader 5.0 and up) existing PDFs. 5)   ap PDF Encrypt 3.0 PDF Encrypt allows you to encrypt (using standard 40-bit or 128-bit or AES encryption ) existing PDFs, set permissions, add user and owner password. 6)   PDF Encrypt COM/SDK 3.0 PDF Encrypt allows you to encrypt (using standard 40-bit or 128-bit or AES encryption ) existing PDFs, set permissions, add user and owner password. 7)   PDF Encrypt COM/SDK Unlimited License 3.0 PDF Encrypt allows you to encrypt (using standard 40-bit or 128-bit or AES encryption ) existing PDFs, set permissions, add user and owner password.