Storing the different information in the same place is impossible. You could use stenography but then anyone with access to the program/source will immediately

Storing the different information in the same place is impossible. You could use stenography but then anyone with access to the program/source will immediately discover the deceit. You can use what hiq is suggesting, https://news.ycombinator.com/item?id=10097533 https://news.ycombinator.com/item?id=10097533, but that is a different method.