Crypto or not?

Thank you for your answers.

I'm going to add somethings.

0041901F |> 8B4C24 14 /MOV ECX,DWORD PTR SS:[ESP+14]
This line put 4Ch in ECX, it's a constant.

00419023 |> 8D441C 20 LEA EAX,DWORD PTR SS:[ESP+EBX+20]
00419027 |. 0FB63C08 |MOVZX EDI,BYTE PTR DS:[EAX+ECX]
This lines take a byte in list of 16 bytes which are used in this algo.

After this code there is others loops but for me, it's this algo the first problem.
I don't understand how to reverse it because it use bytes together.

P.S. Peid find CRC32b.