Hacking chocolates and the security mindset
Who doesn’t like chocolate? I am a big fan of a Brazilian coffee/chocolate chain called Ychocolates (fictitious name). They produce good chocolates and serve good coffee as well. Recently they introduced a simple loyalty program: you buy products there and earn points for each purchase. After certain amount of points, you can redeem them and transform them into a delicious chocolate. It sounds simple and straightforward. To participate in this program the person needs to supply their name, an CPF (Brazilian identification number) and a phone number. Every time a person goes into one of their stores and buy something, they should supply their CPF and get the points. Once you inform your CPF the cashier (verbally) will tell you how many points you have earned so far. If you have the minimum amount of points for a reward, you can get a chocolate. I’ve noticed cashiers always inform the accumulated points to the customer. It seems to be part of a procedure. I personally used my poi