https://avoimenkoodinmaailma.blogspot.com/ Kimmo Huosionmaa Almost every person, who lives in the cities is using sometimes the bus or train. The public transportation system is one of the best inventions, what cities have. This system contains trains and busses, and of course, it's not free. When we are using this system, we must buy the ticket for traveling in the public transportation system, and this thing contains one very big danger for information security. That danger is connected with the customer groups, what have the right to get lower price tickets. In some cases, the handicapped and mental patients have the different group for sale than other users. To getting the sale, we must show that we have right kind of diagnoses or we are students in some kind of high schools or universities. And that can danger our privacy because another reason for sale is needed the doctor's testimony, and that might be the thing, what we would not want to tell anyone else in ...