Download- Nwdz Lshrmwtt Khlyjyt Fatht Layf Ttshrmt... Link

Given the impossibility of solving without more info, my best guess is the author used to obscure a phrase like "open the file..." or something similar, and "Download-" is plaintext indicating the action.

nwdz ROT13: a→n, b→o, but wait, do it properly: n→a, w→j, d→q, z→m → ajqm (no). Actually ROT13: n→a, w→j, d→q, z→m — yes, ajqm . Doesn’t look like English filename. Download- nwdz lshrmwtt khlyjyt fatht layf ttshrmt...

If you share the full paper excerpt or the exact cipher definition from the paper, I can decode it precisely. Given the impossibility of solving without more info,

This looks like a fragment of a coded or encrypted message, possibly using a simple substitution cipher (like Atbash, Caesar, or a keyboard shift). do it properly: n→a