The Internet has started in 1984 linking 1,000 university and corporate labs. In 1998 it grew to 50 million users, while in 2015 it reached 3.2 billion people (44% of the global population). This enormous user growth was combined with an explosion of data that we all produce. Every day we create around 2.5 quintillion bytes of data, information coming from various sources including social media sites, gadgets, smartphones, intelligent homes and cars or industrial sensors to name few.