How this Works
For the first few contests, I will create the format and app for you guys. Basically, you will recive an app to check/create files, and you must reverse engineer it to figure out how the checksum works. This should help some of you learn about cryptography and encryption.
Rules
- No Illegal Content.
No Private key Cryptography, AES is fine because you need the key in the assembly. If you want to use RSA, you must hardcode the key.
The Check app must be able to create new files in your format.
No Remote code, ex server side scripts.
If you forget to obfuscate your app, the contest will be restarted with a new app.
The winner of each will get something, I don't know what, maybe an emblem when those get fixed.
When posting the checksum details, please provide a coded method on how to recalculate it.
- Obfuscate your check app.
Use crypto and custom encryption.
I have one thing over all of you, which is some assembly skills, so get creative.
Here is the first app. It creates a file with my own format, using a jpeg file. It has a piss easy checksum, so this should prove easy to some of you.