The BBC News website reports that the South Korean national identity card scheme is going to have to be completely rebuilt at the cost of billions of dollars. Identity card numbers have been a prime target for hackers due to their use across a variety of sectors for accessing services. It is estimated that the ID numbers and personal details of an estimated 80% of the country’s 50 million people have been stolen from banks and other targets. Even the South Korean president has been a victim of data theft. The rebuild may take up to a decade to complete.