Finland has called on its citizens to take more care securing their Wi-Fi networks after it emerged this week that about â,¬200,000 (£135,623) had been stolen from a bank using an unprotected home network. The Helsinki branch of global financing company GE Money called on police to investigate the theft in June. Police now believe that the company’s 26-year-old head of data security in Helsinki stole banking software from the company along with passwords for its bank account.