Can you say the ABC on your fingers?

Looking at the code you might notice that the first two characters (wu) have an interesting correlation with the Hex ranges for numbers (30-39).
w and u are the 4th and 6th last characters in the alphabet, subtracting one from each, will give us 35 that converts to 5
From this identification, convert each character to its Alphabet index where a=25 and z=0
3 5 7 1 6 8 7 3 3 5 7 3 7 9 7 0 6 8 6 1 7 8 7 0 3 4 7 7 3 8 7 3
Pair the numbers up
35 71 68 73 35 73 79 70 68 61 78 70 34 77 38 73
Convert from Hex to text for the solve
5qhs5syphaxp4w8s

Notice that until now syphax was not a valid keyword.
One smart thing to do sometimes is try to redeem a code before substituting it when the keyword section is a single word.
This is how we identify new keywords, as was the case here.

That key has been used before but you’ll need to reorder it 

After trying rot, atbash and morse nothing comes out. Let’s try Vigenere.

Let’s assume that the first part SHZ needs to be a number. The only possible fit would be TWO or SIX. You can “brute” Vigenere by simply typing the numbers as the passphrase.

Passphrase:TWO
Message: SHZ
Result:ZLL

Passphrase:SIX
Message:SHZ
Result:AZC

AZC is an interesting result, seems like the alphabet read AZ next would be BY but there seems to be a skip which explains AZC. Logically the rest of the sequence would then be AZCXEVGTIRKPMNOLQJSHUFWDYB

Let’s try it:

Passphrase: AZCXEVGTIRKPMNOLQJSHUFWDYB
Message: shz.ugs.kboyd.bqgo.u.vrnl.h.ysr.b
Result: six.xcx.eight.meta.j.five.n.two.d

6xcx8metaj5n2d

– – you might want to look at the distribution . .

Look closely at how the groups are formed, especially where the numbers would be in the code. Notice that they are all 5 characters long ? In morse we know that numbers use 5 bits.

We have 4 characters I,X,C & M. By trail and error the only possible combination is that X & C are dashes and I & M are dots

Let’s translate:
XXIII MXI XII XXIX XXXXI MXI I III XXX XI IX XI CMXI I XII MMIII MMXI MMMXX XX
--... .-. -.. --.- ----. .-. . ... --- -. .- -. -.-. . -.. ..... ..-. ...-- --
Convert morse to text

7rdq9resonanced5f3m