File Extension Database

Open SEF File

SEF extension files are mainly used for the Steganos encryption format. This format was created by Steganos GmbH. These files that use the SEF extension are encrypted files and are created by Steganos Privacy Suite software.

The Steganos suite provides password creation and protection services for files, confidential documents, photos, videos on the computer, as well as online accounts, in the cloud, emails, etc.

The software uses a state-of-the-art 384-bit AES-XEX encryption with AES-NI Hardware acceleration protocol, and the stub files have the SEF extension.

SEF files, because they are classified as encrypted, cannot be opened by software other than the one that created them, which in this case is Steganos Privacy Suite.

How Can I Open SEF File on Windows

We researched and learned that the best way to open SEF file is to find a SEF file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a SEF file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open SEF file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as SEF file opener then try to search online for "SEF viewer", "application to open SEF file" or "open SEF file" queries in the search engine you like.
Install the application you found and check if it can open SEF file

How Can I Open SEF File on Mac OS

We recommend to find a SEF file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a SEF file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with SEF file.
If you know the Mac OS application which can work as SEF file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open SEF file in it.
If you don't know the application which can open SEF file then try to search for "SEF viewer", "application to open SEF file" or "read SEF file" queries in the online search engine you like.
Install the application you found and check if it can read SEF file

How Can I Open SEF File on Android

If you downloaded a SEF file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded SEF file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "SEF".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "SEF viewer", "SEF file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open SEF File on iPhone or iPad

To open SEF File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the SEF file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "SEF". This way you can find apps which can open SEF files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "SEF viewer" or "SEF file" online in your favorite search engine.