1)   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.
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 2)   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.
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 3)   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.
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 4)   Lizard Safeguard PDF Security 2.6
PDF document security software with DRM controls. Control who can view PDF documents & how they are used. Prevent copying, sharing, modifying, screen grabbing. Control the number of views and prints & when documents expire. No useless passwords.
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