Hello, Joyshree!
I specialize in reverse engineering, security auditing and program protection. Your project sounds like an interesting challenge and very good fit.
In short, this crackme will show "good job!" when you enter correct key (and "try again!" if wrong). We can discuss further over chat. Thanks for reading.
Just FYI, below are some links from my previous projects:
www.freelancer.com/projects/c-sharp-programming/Convert-Windows-Dll-function-code/
www.freelancer.com/projects/cplusplus-programming/Need-someone-expert-EXE-file/
www.freelancer.com/projects/C-programming/Diassembly-exe-file/
www.freelancer.com/projects/C-Programming/remove-security-from-exe/
www.freelancer.com/projects/C-Programming-Metatrader/decompile-protected/
www.freelancer.com/projects/C-Programming-Delphi/Need-reverse-engineer/
www.freelancer.com/projects/C-Programming-Anything-Goes/bypassing-lost-password/
www.freelancer.com/projects/Java-Visual-Basic/Revsere-exe/
www.freelancer.com/projects/Delphi-Anything-Goes/EXE-Change/
www.freelancer.com/projects/Software-Architecture/Reverse-engineering-7762549/
Best,
-Mike