Obviously, I didn't explain it well enough, as you're the second person who didn't understand. The key ("administrator") relates to the name of a character in the story. The relationship between this name and "administrator" is the deciphering function. So, if the character's name was "rotartsinimda," the deciphering function would be reversing words. Then, once you've figured out this function, you need to apply it to the code. The numbers relate to the position of the code text within the story.

I hope that helps.