KeygenMe

Hey there!
I made this KeyGenMe because I enjoy playing chess.
This challenge is written in .NET and involves some mathematical operations, mixed with a few chess-related twists. Your task is to figure out the logic behind generating a valid serial key based on the username you enter. But be warned—it’s not as simple as just moving a pawn forward ( maybe a hint )
Protection used : None.
Goals :
1. Provide valid combination for Username - Serial Key ( Bronze )
2. Fully KeyGen it - every username with different serial key algorithm ( Silver )
3. Full KeyGen plus EXPLANATION on what u did and how you figured out everything ( Gold )
Good luck!

This is a simple MD5 Hash keygenme.
It is protected with the themida.

VSEC KeygenMe #2
What you have to do:
I hope peoples who interested in Reverse Engineering learns something from this type of challenges.

Best Regards.
 

Simple Code Virtualization KeygenMe ( Not Commercial VM )
Try to find Algorithm and make correct key 
It's not too hard
Your opinions about VM Complexity are welcome.

Thanks

I have provided a zip archive which contains two .py files, as seen in the screenshot. In LicenseChecker.py there is a validation function invoked by main.py where you put the key in the given format.
The python code is obfuscated using a obfuscator I'm currently working on. If you solved the challenge, or have any feedback to give, or need hints/help with reversing without spoiling, please let me know. Thanks.
 
You can see original source code and the solution in the 'Authors Code' and 'Authors Solution', if you wish.
Good luck!

A simple console application that displays the HWID and asks you to enter an "activation key" for it.
Key format: xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx
The solution will be a description of the algorithm to generate an activation key for any HWID value (there is no need to write code).

P. S.
Archive password: 123

Here is a keygen challenge I got recently. This one requires to find the coefficients of a 26th degree polynomial that sums up to a specific value. A valid serial is also provided. The challenge is to code a keygen with least / reasonable time complexity without patching anything.
Update: Added my initial code that barely works. Please let me have your suggestions to improve the code.

This is a little past time project I have been working on, here I put an interesting spin to conventional c# obfuscation.
Try to unpack this file or at least keygen it.

Your goal is to create a keygen and make a tutorial and/ or write instructions about the steps done by you.
What is C++/CLI?
C++/CLI is C++ support .NET framework to make managed application run on .NET framework.
https://en.wikipedia.org/wiki/C%2B%2B/CLI
Feel free to post your solutions.

Crack and keygen this for training your skills. It is protected with ConfuserEx using some anti tricks.
Write a tutorial and document the methods used in your solution.
My Anti-virus engine detects it's a virus, but it's not.
 

I coded a keygenme, simple tricks.
I hope you enjoy your time trying to solve this!

Provide a valid serial and User ID or make a keygen. Good Luck.

Provide a valid pair of name and serial, or write a keygen.
Good luck.

Hi
I got this keygenme in my hard drive, this is from CIN1TEAM and created by MR. Teo. 
Thought this might help someone to test his keygenning skill.
 
Thanks

Only simple algorithms - for one name one key.
Provide a valid pair of name and serial, or write a keygen.
Good luck.
 

The real goal is to make a keygen capable of generating infinite valid combinations of name and keys. 
Btw, also a valid serial is appreciated
The only protection used is renaming.
Good luck!
@kao Long time no see 🧐