If "KFNACzip" is part of a specific software package, tool, or document, providing the context (e.g., "It is used in X software") would allow for a more precise search. If you can provide more context, such as: did you see this term?
Various Unix-like implementations. Other common compression tools like 7-Zip, RAR, or Brotli. KFNACzip
If you are researching compression technologies, you may be looking for: Standard compression formats Info-ZIP . If "KFNACzip" is part of a specific software