PGP Encryption Utilities Plugin is unable to encrypt file as .pdf extension but it is working fine for .txt file type.It is working fine for .txt file format as an encrypted file but is unable to create encrypted file with .pdf extension.when we try to open the encrypted file with .pdf extension gives above error.is there any solution we can use for PGP Encryption Utilities?
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Do you have a specific reason for why you believe the Acrobat Reader is able to open a file that is encrypted this way?