Okay, so firstly, this is only a partial answer, as I do not have all of the clues figured out just yet, but I'm sure you can tell me if I'm on the right track
Our starting value is: cch kyhrydyc hd kq mgskx zh sxtkksroqnyeksg
The first clue comes in from Alan Turing, in 1940 he deciphered the Enigma machine, so we're looking at an Enigma Cipher, After the slash we have a series of Enigma rotor settings (and as there's only 3, it's not a 4-rotor machine)
UKWB - This is the reflector settings, which leaves I/7/18, I/12/4 and I/19/7 as our rotor settings. All rotors are set to I (Roman Numeral 1)
So we are limited to an Enigma Model 1 or M3, as these are the only 3-rotor Enigma machines with a UKW-B reflector setting.
Leaving the plug board blank gives us:
rpe lsfhokqy uu jp wvqll gd egxnwvpijudyuzt
Next, the second line
Brutus / Douglas Adams
Brutus is a character in William Shakespeare's Julius Caesar; so I reckon this is some kind of Caesar Cipher.
This leaves Douglas Adams as the clue to solve the Cipher. In his novel series "The Hitchhiker's Guide to the Galaxy", the most famous number is 42. (Being the Meaning of Life, the Universe and Everything)
Plugging into the Caesar Cipher the above string with Rotation of 42 gives us:
bzo vcpryuai ee tz gfavv qn oqhxgfzsteniejd
Finally the third line (Edited from OP's comments about the hint being used incorrectly)
Leon Battista Alberti / $\leftarrow$ BTW $\rightarrow$
Google searching this guy brings up that he was a cryptographer who developed his own Cipher (The Alberti Cipher).
The hints point to Giovan Battista Bellaso and Johannes Trithemius; who each have their own Ciphers... So maybe these Ciphers are needed next?