Apple Safari fails to open AEM Document Security protected PDF documents

When AEM Document Security protected PDF documents are opened with Apple Safari running on a devices using Apple iOS, the documents fail to open.

Install Adobe Acrobat Reader on the device running Apple iOS.
Save a copy of the AEM Document Security protected PDF documents on Apple iOS device.

If you access the protected document through a direct URL in Safari on the device running Apple iOS, the document fails to download. For such a scenario,
- You can use a separate browser to download the document or open the document from a shared location. For example, DropBox and Google Drive.
- You can also email the document and save a copy of the document on the device running Apple iOS. For detailed instructions see, how to open PDF documents in Adobe Acrobat Reader for iOS.
Open the saved document with Adobe Acrobat Reader.