Hackers' way of breaking into Europe's freezers has been leaked Cyber security experts say hackers who increased the temperature of food fridges and freezers in recent attacks on European grocery chains likely broke into the equipment using Internet-connected systems protected by default passwords or outdated software. These attacks, which were repeated twice in three weeks, targeted chain stores such as Carrefour and Deleuze in Belgium and Zaman and Loll in Sweden and caused a large amount of food to spoil and be thrown away. Also, in the same wave of attacks, three blood storage centers in France were also targets of a cyber attack. - Link.