I recently returned to school. Most of my reading material comes in password protected ebooks. When I opened it with Adobe Reader, I could not enter my username and password. Opens fine on my PC. I tried all the readers on the playstore , including Aldiko Book Reader, ezPDF Reader Multimedia PDF, RepliGo PDF Reader and many others. Repli allowed allowed to enter my username, but not the password. To my disappointment, I cannot read my materials on my Note 10.1 If anybody knows of an app or procedure to allow me to unlock password protected ebooks with ones username and password, it will be a great service for me and others in my situation.