Some context: All danish high school students have their own laptop. Exams are supposed be a test of what the students have learned during the course (for the w

Some context: All danish high school students have their own laptop. Exams are supposed be a test of what the students have learned during the course (for the written exams this means during the last two or three years). To make exams reflect the normal work process of s student most exams are open book - books, notes, old exercises and papers are allowed. Some exams are divided in two (English, math etc): one short part with nothing but paper and pencil and one longer part with everything allowed (except communication with others). In recent years the publishing houses have gone digital in a big way. Some school no longer provide books for the student - the school buys subscriptions for online books. Until this year internet access during exams were forbidden (with the exception of access to dictionaries). This year a new law adjusted the rules. A wide coaliation of parties including the all three parties of the government decided that internet access should be allowed to. This summer a few students were caught cheating. During the written exam they uploaded the paper/exercises to a firm that offered to write the paper for them - for a fee of course. As the rules are now only the student is breaking the law. The minister felt a need to react and sent out a statement that internet access were to be banned. However she forgot to ask the coalition behind the high school reform. Even the two other parties in the government disagreed. In short: internet access will probably not be banned. The latest idea from the minister is to allow high schools to search the computer of a student, if the school has a suspicion of cheating. (The irony is that the minister is from the most liberal party in danish politics). Cheating is of course a serious matter, but the current proposal seems to be somewhat overreaching. It will hopefully not get the enough votes. Question: How would you prevent cheating in an exam where internet access is allowed?