Data are sold by hackers on auction-like black market sites, where information to authenticate credit card accounts sells for $1-$30 an account depending on the card credit limit. Passwords for email accounts sell for $1-$20.
About 90 percent of illegally traded personal data involves the combination of an account name and password, Experian said.
The most prevalent form of identity theft is account takeover, where someone simply begins using a consumer’s email or bank account. Fraudsters can also set up new accounts in a user’s name, running up bills which can take a long time to sort out with creditors.
Peter Turner, managing director at Experian Consumer Services in the UK and Ireland, said consumers had become too complacent when they went online.
“Although 14 percent of Britons admit to being concerned about the risk of online ID theft, many more, 43 percent, have no such worries,” he said.
People’s behaviour can make them more prone to having their data hacked. Three-fifths of internet users never log out of websites and a quarter never check whether a website they are visiting is marked with an image of a security padlock to denote that it is a secure site.
Consumers also frequently reuse the same password for many sites – a quarter use a single password for most of their accounts, according to research from Experian this year. Many also use simple, easy-to-crack passwords, such as dictionary words or names of pets. Mr Turner recommends having unique passwords for at least the main email account and for any online banking services.
As part of its research Experian set up eight fake email accounts to see what would happen when hackers got hold of the details. All eight were taken over within five hours, by criminals based in countries ranging from Albania to South Africa. The first messages to be read in the account were emails related to passwords, followed by messages between friends and family.
Experian tracked about 9.49 million items of personal data being traded in 2010, rising to 19.04m last year and likely to be nearly 40 million by the end of 2012.