In the age of total digitalization, it's hard to imagine life without the internet and smart devices. But even people who behave cautiously in the real world often don't pay enough attention to their digital security. Meanwhile, the consequences of such carelessness can be faced at any moment: an intruder can take control of a car, a TV can record viewers' conversations, criminals can use toys to kidnap children, and video cameras can be accessed and spied on. There are also government projects like 'Smart City,' which envision the widespread implementation of video cameras and facial recognition technologies. This doesn't mean you should embrace digital seclusion and utterly avoid gadgets, but it does mean you need to learn and adhere to basic security rules. In his book, Mikhail Reitman explains how to minimize the risk of personal data leakage, making it more difficult for potential attackers.