As the name suggests (Secure Key), Secure-K OS is a live operating system, based on Debian 9 Stretch, meant to be run from any USB key and ???developed with security in mind???, according to its developers.
Secure-K OS image contains five partitions; they can assure a ???live??? experience with encrypted data persistence, plus a native UEFI/Secure Boot compatibility and a partition dedicated to the update of the kernel. As far as I know, it’s the first live operating system which features a complete system and kernel update! Consider also that kernel partition is ISO9660 formatted, so during the update a re-write of this partition is performed.