If an input file has a user password set, the user password is copied over into the new output file even if -userpass <Password> is not supplied on the command line.
-d option must have Owner password
All encrypted documents that you decrypt with -d ownerpass must have an Owner password. You cannot use the -d option without an Owner password. If you have a legacy PDF document that was encrypted without an Owner password, you must create an Owner password for the document before using the -d option to decrypt it.
APCrypt cannot decrypt files with form fields. If you need to apply encryption to a document with form fields, delete them, remove encryption manually beforehand, or flatten them with FDFMerge.
Linearization (-w) should not be used with files that contain articles.
To Get Help
Documentation for APCrypt can be found at /apcrypt/.
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