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Photoshop doesn't support 40 bit encrypted PDF files

Last Updated: Apr 22, 2011 05:20PM EDT

When using the ImageMan PDF export addon to create files that can be opened in Photoshop you must specify ENCRYPT_128 to use 128 bit encryption as Photoshop will fail to open files encrypted using ENCRYPT_40.

When opening a file encrypted with 40 bits the password prompt will be repeated 3 times despite entering the poper password after which time you'll get an error that it cant open the file.

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