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In this tutorial, we learn how to encrypt PDF documents on an Android device using Android 11. We use a PDF reader application downloaded from the App Store. After opening the app, we select the file to encrypt, set a password (e.g. "abcd"), and the file is encrypted with the name "_encrypt." When opening the file, entering the wrong password fails access, while the correct password grants access. The encrypted file can now be shared with various options.
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