If you have ever tried to view a password protected PDF file on your iOS device, in the Mail app or Dropbox you might have noticed that your iPhone displays a blank image and fails to open password protected PDFs. This tutorial will show you how to open such files by using the free iPhone application iBooks or other paid applications that you might already own.
Whenever you try to open a protected file in Mail or Dropbox you will see a screen similar to the one showed below.
We are going to show you how to view protected PDF files using three popular iPhone applications.
iBooks is a free application from Apple that allows you to read books and PDF files on your iPhone, iPod Touch or iPad.
To open any PDF file in iBooks you need to first download and install iBooks on your iPhone. After you have installed iBooks, simply tap on the Export icon(usually located in the top or bottom corner in iPhone apps)
Now tap on “Open In…” and select iBooks from the list of options. iPhone will remember your last used option and will show it next time as Open in “iBooks”by default.
Password re-entry: If you have any sensitive information stored in the PDF document please note that iBooks will not ask for password again unless you quit the app. Minimising the app is different from quitting. Read our guide on how to quit iPhone applications.
2. Air Sharing Pro
Created by Avatron Software, Air Sharing Pro is another very popular iPhone Application for storing and viewing your documents.
You can open any protected PDF file in Air Sharing Pro using the same method as above.
Password re-entry: Just like iBooks, Air Sharing Pro will allow you to access the file without re-entering the password until you manually quit the application.
ReaddleDocs has been one of the top Productivity apps for quite some time. Most features are same as Air Sharing Pro.
You can open any protected file in ReaddleDocs by tapping on Open In…, as described previously.
Password Re-entry: This is one place where ReaddleDocs functions differently. You have to enter your password everytime you want to access your protected file. This is the approach that works best for me for all my confidential PDF files.
I own all of the three apps, and will recommend ReaddleDocs for storing all your confidential files containing sensitive information, as it is more tiring to quit the application everytime than entering the password.
For less sensitive data, iBooks is perfect. Firstly, because it is free and secondly it is the best reader designed for iOS devices.