[seanwilson]

> The user would then need to connect to the internet after the competition, log in, pay, and then could get their decrypted competition results.

Can you rely on them eventually connecting to the internet after the competition?

Can you add a cloud component that stores and shares the results online that they'd want to access?

Is it important to encrypt the local results? I would worry about getting successful first before wasting even a small amount of time on copy protection. People that are going to burn their own time breaking copy protection and risk legal consequences for the sake of a few $100 are unlikely to ever be your customers anyway.