| Cipher | Plain | |--------|-------| | f | F | |
Download- fydyw nwdz bnwth msryh mn bnat altjm... The presence of is a strong hint that the rest of the line is a plain‑English message that has been encoded with a mono‑alphabetic substitution (each ciphertext letter always maps to the same plaintext letter). Download- fydyw nwdz bnwth msryh mn bnat altjm...
f → N y → E d → V w → R If this were correct, the second word () would become ? R V ? – not a common English word. So “never” is ruled out. | Cipher | Plain | |--------|-------| | f
f → F y → I d → L w → E So far we have a solid partial key: f → F y → I d →
f → L y → E d → V w → L Now would read ? L V ? – again not promising.