Our formula was not a concept
Or at least I didn't understand
Please explain by example
I also want a complete algorithm to input and output
Thanks for helping

Well despite I can't help you with this one,i think that you can ask a bit more politely as for a new comer you have valuable infos and help to this.
:rolleyes:

Mcr4ck I think you need to read more carefully the answers being given to you and make more effort to understand them. But beware, although the lower 4 bits are easy to find, that may just be weak obfuscation, Any good hash should be almost impossible to find a reverse algorithm for.

Git

Can you please try to change the first to input digits like 01 02 03 and so on? So that we can see what is happening when only changing the first digits.

-e