Masker is described as 'Program that encrypts your files so that a password is needed to open them, and then it hides files and folders inside of carrier files, such as image files, video, program or sound files. The strong encryption up to 448-bit and password protection makes the hidden' and is an app. There are more than 50 alternatives to Masker for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Masker alternative is TrueCrypt, which is free. Other great apps like Masker are Axcrypt, Windows BitLocker, Encrypto and Secure Folder.