If you are looking for technical documentation or research regarding the architecture behind such files, the following resources are considered the definitive "papers" for the format: Official Technical Documentation

Since 7z files primarily use LZMA (Lempel-Ziv-Markov chain algorithm), technical details on how they achieve high compression ratios are often found in the LZMA SDK documentation . Core Features of a .7z File

Uses LZMA/LZMA2 to provide significantly better compression than standard ZIP files.

While there is no widely recognized scientific paper titled "fjtwmp.7z," this filename appears to be a compressed archive in the 7z format , a common open-source format developed by Igor Pavlov.

Supports strong AES-256 encryption for both file data and headers.

If you have encountered this specific file, it likely utilizes these features: