File Extension SKN File Format SecurDesk ! graphic skin file SKN stands for SecurDesk ! graphic skin file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Nevron .NET Vision adds skin manager, tree layouts Access .SMD Files What is the difference between NVIDIA Graphics and Integrated Graphics?