Silent Serpent

Reverse Engineering 150 pts standard

I have a friend that enjoys coding and he hasn't stopped talking about a snake recently.

He left this file on my computer and dares me to uncover a secret phrase from it.

Can you assist?

        
          View Hint : Hint 1

XOR can both encode and decode using the same key.

        
          View Hint : Hint 2

Try applying the same operation to every number.