.GXK File Extension

Encrypted archive created by Galaxkey, a program used for securely storing and transferring files; incorporates encryption as well as password protection; requires a registered Galaxkey identity as well as the Galaxkey software to extract files from the archive.

GXK files are often used in corporate environments for encrypting and sending documents as email attachments. Galaxkey provides a Microsoft Outlook plug-in as well as a standalone Windows utility for creating and extracting GXK files.