Files with krf extension might be found as curve reference data files from Kevin's Mesh Efficiency Simulator Software (KMESS).
There is one other file type using
the KRF file extension!
.krf - DNSSEC-Tools keyrec data
KRF file extension - KMESS curve reference data
What is krf file? How to open krf files?
File type specification:
The krf file extension is mainly related to KMESS (Kevin's Mesh Efficiency Simulator Software) and used for one of its default file types.
The krf file used in KMESS contains a set of energy-efficiency-uncertainty pointy pairs. Seems like some custom file format for a custom software from Los Alamos National Laboratory.
This KMESS program is not related to another software of the same name, which is a free instant messaging program for Linux platform.