Code #1

Observations

Looks like hex, check the ranges

Let’s start by making pairs to see what we are working with

af 8a 7e 77 aa 7f 9a 98 7e ae 7c ab 8b

Look at where the numbers are in the passcode format, they all start with A. Looks like hex atbash, use this index

0123456789abcdef
fedcba9876543210

50 75 81 88 55 80 65 67 81 51 83 54 74

Convert decimal to Ascii

2KQX7PACQ3S6J

PAC is P.A. Chapeau

2kqx7chapeauq3s6j

Passcode format is there, remember to apply the same method to the keyword

Passcode format is there, go through your usual cipher routine

Rot and Atbash don’t give anything good to work with, morse is next

..--- ..-. --. -... .---- ..- -.- ... -.. ....- .-- ..--- ..-.

Swap morse bits

--... --.- ..- .--- -.... --. .-. --- .-- ----. -.. --... --.-

Convert morse to text

7QUJ6GROW9D7Q

Looks like we are missing a letter in the suffix, h was the winning combination

7quj6growh9d7q